Don't Feel Like Fighting? Check Out These Other Terrific PC Games Brawlhalla Brawlhalla (for PC) 3.5 Good The Blue Mammoth Games-developed Brawlhalla is a free-to-play fighting game—available on PC, console, and mobile—that builds upon Smash's wild, character-focused gameplay by introducing unlimited wall-jumps and various other movement options that facilitate fun combat.The expanding character roster also features the likes of G.I. Joe's Snake Eyes, WWE's Randy "Macho Man" Savage, Tomb Raider's Lara Croft, and Street Fighter’s Chun-Li. Many of these licensed fighters require spending cash, but that's fine; it's worth spending $20 for all current and future characters, because this platform-fighter is just that exciting. Capcom Fighting Collection 2 Capcom Fighting Collection 2 (for PC) 4.0 Excellent Capcom continues resurrecting its classic titles for modern audiences with Capcom Fighting Collection 2. This compilation features cool deep cuts not found in previous entries, including Power Stone and Project Justice. Along with the nostalgia, you'll enjoy new upgrades like online multiplayer (but no crossplay) and revamped display options. If you've had your fill of Street Fighter, this is a great way to broaden your fighting game horizons. Capcom Fighting Collection 2 (for PC) review Dead or Alive 6 Dead or Alive 6 (for PC) 3.5 Good Dead or Alive 6, much like its immediate predecessor, is one part fighting game, one part fashion show, and one part schlocky action movie. Individually, each of the game's widely differing elements might not stand up to scrutiny. After all, DOA 6 isn't the best fighter, doesn't offer the deepest character customization, and doesn't quite reach the Tekken series' level of story insanity.Still, Dead or Alive 6 is a fun and surprisingly strategic PC game that offers enough freshness to warrant playing with its new Break Blow and Break Hold tools. Plus, the game's familiar Triangle System and Danger Zones are highly entertaining, too. Divekick Divekick (for PC) 3.5 Good Iron Galaxy Studios' Divekick is the most hipster fighting game ever created. It's the product of the indie scene that mercilessly parodies fighting games and their die-hard community, yet demands that you be part of the underground circle to fully get all of the references and in-jokes.It's an odd game, but an interesting one if you open your mind to the insane concept of a two-button fighter based entirely on the idea of jumping and kicking. And 20-second rounds. And one-hit kills. And a line of scrimmage. Yes, Divekick is a fighting game freak show, but one worth checking out. Dragon Ball FighterZ Dragon Ball FighterZ (for PC) 4.0 Excellent Beside Fist of the Northstar and Jo Jo's Bizarre Adventure, there are few anime properties that are as intrinsically suited to the fighting-game treatment as the Dragon Ball series. Spanning multiple series, movies, and generations of characters, Akira Toriyama's manga-turned-anime-turned-game series is all about buff monkey men, humans, aliens, and androids trading blows in actual earth-shattering battles.The series' latest video game adaptation, Dragon Ball FighterZ, ditches the Xenoverse games' arena-brawling model in favor of 3-vs.-3, tag-team fighting on a 2D plane. The gameplay shift is just one of the many reasons Dragon Ball FighterZ is being held aloft as one of 2018's notable titles. Its beautiful design, intense combat, and accessible control scheme add up to a game that anyone can jump into for Super Saiyan thrills.Plus, you can kick Cell through a mountain. Dragon Ball FighterZ (for PC) review Fatal Fury: City of the Wolves Fatal Fury: City of the Wolves (for PC) 4.0 Excellent The King of Fighters series is great, but Fatal Fury: City of the Wolves resurrects the SNK fighter that started it all. Familiar faces like Terry Bogard and Mai Shiranui battle real-life guest characters like DJ Salavatore Gannaci and soccer star Cristiano Ronaldo gather for this excellent take on fundamental, 2D fisticuffs. Rich mechanics add depth to both offensive and defensive play, while comic book-inspired graphics give brawls a distinct visual identity. Crossplay multiplayer shines with rollback netcode. Fatal Fury: City of the Wolves (for PC) review Garou: Mark of the Wolves Garou: Mark of the Wolves (for PC) 4.5 Excellent Upon its 1999 release, Garou: Mark of the Wolves—a surprisingly deep and visually stunning entry in the long-running Fatal Fury series—was hailed as SNK's wondrous response to Capcom's Street Fighter III. Nearly 20 years later, SNK has finally given the fighting game the proper PC treatment by releasing it with numerous additional graphics options, leaderboards, and rollback, online versus play.Despite removing and downplaying some series-specific elements, Garou doesn't feel any less of a Fatal Fury game, however. It's set in the Southtown, and it features multiple fighters with classic Fatal Fury lineages, whether it's blood relationships to, or martial-arts tutelage from, older characters. Kim Kaphwan isn't in the game, for example, but his sons continue his legacy of swift, combo-heavy tae kwon do kicks.The result is an excellent game that boasts beautiful animation, Just Defend parries, and the strategic T.O.P. system that delivers increased attack damage, limited health regeneration, faster super-meter build up, and an exclusive special attack when your activate the mode. Guilty Gear Strive Guilty Gear Strive (for PC) 4.0 Excellent The Guilty Gear series reigns as the king of anime-style fighting games due to its gorgeous art style, and a rich, demanding, and lighting-quick combat system. Unfortunately, its oceanic depth and mountainous skill ceiling proved inaccessible to the causal player—until now. With Strive, developer Arc System Works streamlines the series’ unique combat mechanics to make them more newcomer-friendly, while retaining the older games' creative richness. Strive comes with fewer extra modes than its predecessors, but there is a lot to love in this PC game, including astounding visuals, impressive character play styles, and snappy, lag-free online play courtesy of top-tier, rollback netcode. Strive is an approachable series entry that shakes up the Guilty Gear formula in the best ways possible. Guilty Gear Xrd -Sign- Guilty Gear Xrd -Sign- (for PC) 3.5 Good Guilty Gear is a niche series within a niche genre, one that's enjoyed a cult following since its first appearance in 1998. With Xrd -SIGN-, developer Arc System Works ditches the series' 2D sprites in favor of 3D cel-shaded graphics in an attempt to expand its audience. Likewise, series creator Daisuke Ishiwatari sought a more approachable play style that maintains the depth and high skill ceiling that long-time Guilty Gear fans love.Still, Guilty Gear Xrd -SIGN- keeps the series familiar fighting action (Roman Cancels, Bursts, and Dusts) that enables creative offensive and defensive play. Guilty Gear Xrd -Sign- (for PC) review Killer Instinct Killer Instinct (for PC) 4.0 Excellent When Killer Instinct debuted for Windows 10 in March 2016, it represented the latest chapter in the continued PC fighting game renaissance. With its arrival, Microsoft's one-on-one game of fisticuffs joined the likes of Guilty Gear, The King of Fighters, Street Fighter, and other high-profile series that now grace the personal computer.Killer Instinct has a combo-heavy engine that caters to both novices and pros, incredibly detailed graphics that boast ridiculous particle effects (everything explodes!), and an over-the-top, NBA Jam-like announcer who screams your accomplishments ("C-c-c-combo Breaker!") at the top of his lungs.Killer Instinct is part of Microsoft's Play Anywhere initiative. So, if you buy Killer Instinct from the Microsoft Store, you'll also be able to play it on Xbox One at no additional cost. It has cross-platform play with Xbox One, too, thus expanding the online player base. There's a Steam version, too. Even better, the game's ridiculously good netcode ensures smooth play across the globe. Killer Instinct (for PC) review The King of Fighters '98: Ultimate Match Final Edition The King of Fighters '98 Ultimate Match Final Edition (for PC) 5.0 Outstanding The King of Fighters '98—with its hops, rolls, blowback attacks, and meter-filling Advance and Extra modes—is one of the best fighting games ever made, so it's no surprise that developer SNK has returned to the title many times since the game's original release.In 2008, SNK celebrated the game's tenth anniversary by porting the team-based fighter to the PlayStation 2 as The King of Fighters '98: Ultimate Match, a game loaded with extra characters (including the almighty '96 Boss Team!), stages, moves, and gameplay modes. Now, a tweaked Ultimate Match is available for purchase under the title The King of Fighters '98 Ultimate Match Final Edition.This version adds numerous graphics options and good, but not great, online connectivity that lets you battle other KOF fans around the globe in 3-vs.-3 action. The King of Fighters '98 Ultimate Match Final Edition (for PC) review The King of Fighters 2002 Unlimited Match The King of Fighters 2002 Unlimited Match (for PC) 4.0 Excellent Like The King of Fighters '98 Ultimate Match Final Edition, The King of Fighters 2002 Unlimited Match is a dream match that eschews a storyline so that developer SNK could include as many characters as possible—even some that are canonically dead, like crime boss Geese Howard. As a result, Unlimited Match boasts one of the largest fighting game rosters of all time, with a 66-character strong lineup.King of Fighters 2002 Ultimate Match continues the series tradition of excellent combat. Although it lacks KOF '98 UMFE's three radically different fight mechanics (Advanced, Extra, and Ultimate), Unlimited Match has a lone system that resembles Advanced Mode. This fighting style gives you plenty of offensive (Dash, Run, Hops, Super Jumps) and defensive (Guard Cancel Strike, Guard Cancel Roll Throw) options for setting up or evading traps. Excellent rollback netcode lets you play people around the world without hiccup. The King of Fighters XIII: Steam Edition The King of Fighters XIII: Steam Edition (for PC) 4.0 Excellent The King of Fighters XIII: Steam Edition brings SNK's incredibly dense, 3-vs.-3, team-based fighter to the PC via Valve's video game marketplace. It's an all-around excellent fighting game, and one of the best in SNK's rich catalog.If you've rumbled with friends and foes in the version that appeared on PlayStation 3 and Xbox 360, you'll feel right at home here: The intricate combat mechanics, meter management, and the best sprite-based graphics ever seen in a fighting game are brought over successfully in this Steam port.Even better, The King of Fighters XIII: Steam Edition contains all the console DLC and the King of Fighters XIII: Climax arcade features. Similar to The King of Fighters '98: Ultimate Match Final Edition, The King of Fighters XIII: Steam Edition has decent online play, but you can expect some hiccups. The King of Fighters XIII: Steam Edition (for PC) review The Last Blade The Last Blade (for PC) 4.0 Excellent SNK put weapons-based, 2D fighting on the map with 1993's delightful Samurai Shodown, but the developer went on to refine the idea of sword-based combat four years later in a somewhat lesser-known Neo Geo title: The Last Blade.Released to the Steam platform with several contemporary bells and whistles, The Last Blade boasts excellent swordplay, a dozen exquisitely designed characters, and a gorgeous anime- and manga-style presentation that make its 19th-century Japanese setting one of the most beautiful in fighting-game history. Marvel vs. Capcom: Infinite Marvel vs. Capcom Infinite (for PC) 3.5 Good Marvel vs. Capcom: Infinite has taken its fair share of flack since its reveal, and the venom is not at all unwarranted. The initial trailer for the tag-team fighting game featured dull, washed-out graphics, and Capcom highlighted the new novice-friendly, auto-combo options that are designed to help casuals bust out cool-looking moves in an otherwise hardcore genre. As a result, fight fans were highly skeptical of the game, as was I.Fortunately, my Infinite sentiments changed upon logging several hours with the game. The Infinity Stone hook and the move to 2-vs.-2, tag team action make Marvel vs. Capcom Infinite an incredibly fun PC game to play in both casual and hardcore sessions.Still, Infinite has presentation and MCU-focused roster issues that prevent it from rising to the very top of the fighting game elite. Mortal Kombat XL Mortal Kombat XL (for PC) 4.0 Excellent When NetherRealm Studios released the blood-drenched Mortal Kombat X to consoles in 2015, the one-on-one fighting game continued to evolve via free and paid updates that added characters, balanced the roster, and improved online play. However, the High Voltage Studios-ported PC version of the game received zero post-launch support, much to the dismay of hardcore Mortal Kombat fans.Thankfully, that changed with the Mortal Kombat XL update, a version of MKX that finally gives PC gamers all the extras that console-based fight fans have enjoyed for some time now. I dislike the idea of paying more money for PC content released long after the console version, but it's hard not to love the additions, which include even more fighters, stages, costumes, and gore.Paid DLC added plenty of guest fighters, which has becoming commonplace in the fighting game circle. They include the Predator and Friday the 13th's Jason Vorhees. The King of Fighters XV The King of Fighters XV (for PC) 4.0 Excellent Developer SNK took KOF XIV's core, revamped the MAX meter, added the Shatterstrike counter system, and gave the character models an eye-catching redesign to create one of the best fighting games in recent history. KOF XV features an updated fighting engine that facilitates fast-paced, creative combat, and near-flawless rollback netcode that will keep you knuckling up with online rivals for hours on end.The game's dense with options. You can play the narrative-driven Story mode, use DJ Station to listen to more that 300 music tracks culled from SNK's rich, decades-long game library (many compositions unlock as you play Arcade mode), engage in casual and ranked online battles, view leaderboards, and check out match replays. In a community-fostering move, SNK included an esports-friendly tournament mode tailor-made for locals and majors like Evo. You can save 15 custom teams, set up brackets and rulesets, and register up to 32 entrants. It's a great touch. In addition, KOF XV lets you join online lobbies to play against others or simply spectate. Mortal Kombat 11 Mortal Kombat 11 (for PC) 4.5 Excellent Mortal Kombat 11 is far more than the guts and gore titles on which the series built its fame. The narrative sequel to Mortal Kombat X, Mortal Kombat 11 uses time travel to pit characters against their rivals in the past in order to alter the present. Whatever.Mortal Kombat 11 continues the series tradition of chop-socky action and otherworldly mysticism to lay the foundation for military operatives, ninjas, gods, and monsters to punch each other squarely in the face. With its character customization, HDR10 support, smooth animations, and new offensive and defensive meters, MK11 is the best Mortal Kombat game to date. Mortal Kombat 11 (for PC) review Samurai Shodown Samurai Shodown (for PC) 3.5 Good Clashing swords, blood spurts, and tense, measured play define Samurai Shodown, SNK's beloved weapons-based fighting game series. This series refresh, the simply named Samurai Shodown, carries those elements to PC after the game first appeared on console. If you've waited this long in hopes that Samurai Shodown would add many PC-exclusive extras, you may be disappointed; this is largely the same game that appeared elsewhere. Still, Samurai Shodown's unique, defense-orientated gameplay makes it a fighting game to check out for sword-swinging, blood-letting action. Prep for lengthy load times, though. Samurai Shodown Neo Geo Collection Samurai Shodown Neo Geo Collection (for PC) 4.0 Excellent Samurai Shodown Neo Geo Collection, SNK and Digital Eclipse's follow up to the delightful SNK 40th Anniversary Collection, contains all the SamSho games that appeared on the original Neo Geo, plus production art, SNK staff interviews, and a true surprise—an unreleased title that only briefly saw a location test. Overall, Samurai Shodown Neo Geo Collection is a wonderful piece of playable history, with the only blight against the PC game being its mediocre online components. Skullgirls 2nd Encore Skullgirls 2nd Encore (for PC) 4.5 Excellent Skullgirls 2nd Encore, the update to Reverge Labs's critically acclaimed original game, takes cues from many highly regarded fighting titles and blends it with the series' unique, cartoony, art deco-influenced visual style.However, Skullgirls 2nd Encore's graphics aren't all that separate it from the competition. The indie fighter boasts a Capcom vs. SNK-style ratio system that lets you select up to three characters to battle up to three rival characters, as well as a Marvel vs. Capcom-style assist system. The fighter also has a built-in system that automatically stops infinites, those annoying and abusive combos that never end. SNK vs. Capcom: The Match of the Millennium SNK vs. Capcom: Match of the Millennium (for PC) 4.5 Excellent With Match of the Millennium's rerelease, the secret best fighting game in the SNK vs. Capcom crossover series finds a new audience. Featuring an 18-character default roster (Athena, Chun-Li, Dan, Felicia, Guile, Haohmaru, Iori, Ken, Kyo, Leona, Mai, Morrigan, Nakoruru, Ryo, Ryu, Sakura, Terry, and Zangief), and three deep groove systems that replicate beloved the companies' beloved fighting game engines, SNK vs. Capcom: Match of the Millennium sees two fighting game universes collide in marvelous fashion.That would be more than enough variety, but Match of the Millennium offers additional goodies. It features standard Sparring, Survival, and Time Attack fighting modes. Olympics, however, is the most intriguing mode, as it lets you indulge in several non-fighting game minigames. For example, you can blast Metal Slug's Mars People in a first-person shooting mode or guide Ghost 'N Goblins' Arthur across pits to snatch up treasure. The Versus points that you earn here unlock extra super moves for the default and secret characters. These contests have the depth of early mobile phone games, but they're a nice diversion from the standard fighting game action.Match of the Millennium is a genuinely entertaining and rich fighting game that combines challenge and strategy with a hefty helping of lighthearted humor. SoulCalibur VI SoulCalibur VI (for PC) 4.0 Excellent The weapons-based combat series has seen its ups and downs over the years, but with SoulCalibur VI, developer Bandai Namco has taken what's worked in the past—swift, strategic combat and robust character customization—and paired it with the new Reversal Edge and Soul Charge battle mechanics to create an engaging PC fighting game that'll shine in all sorts of battles, whether they're between buddies or on big esports stages like Evo.Combat is crisp and rewarding, with a universal control scheme that makes it a breeze to pick up a new character. Each fighter has a horizontal attack, vertical attack, kick, block, parry, sidestep, guard-crushing Break Attack, and Critical Edge super attack. This control scheme will feel familiar to anyone who's played recent SoulCalibur titles, and it leads to some tense combat moments as you attack and defend. Street Fighter 30th Anniversary Collection Street Fighter 30th Anniversary Collection (for PC) 4.0 Excellent Film aficionados rely on The Criterion Collection to take vital classic and contemporary movies and present them in thoughtful, information-filled packages for modern audiences. Until very recently, the 40-year old video game industry lacked its own Criterion Collection, letting important pop culture contributions slip into oblivion due to incompatible hardware and software formats, expired licenses, and plain neglect. Thankfully, the games preservation experts at Digital Eclipse have taken up the task, blessing gamers with titles that celebrate classic titles via accurate emulation and a bounty of production-related extras and modern touches. The company's first foray into the fighting game genre is Street Fighter 30th Anniversary Collection.This collection doesn't include Street Fighter: The Movie, the Street Fighter EX titles, or X-Men vs. Street Fighter, but you will find all the core arcade releases. The lineup includes Street Fighter (1987), Street Fighter II (1991), Street Fighter II: Champion Edition (1992), Street Fighter II: Hyper Fighting (1992), Super Street Fighter II: The New Challengers (1993) Super Street Fighter II Turbo (1994), Street Fighter Alpha (1995), Street Fighter Alpha 2 (1996), Street Fighter III: New Generation (1997), Street Fighter III: 2nd Impact Giant Attack (1997), Street Fighter Alpha 3 (1998), and Street Fighter III 3rd Strike: Fight For The Future (1999).Even better, you don't just get the games. This collection includes a sprite/animation view, design documents, a historical timeline, and a jukebox. In short, Street Fighter 30th Anniversary Collection is a love letter to one of the most important video game franchises of all time. Street Fighter V: Champion Edition Street Fighter V: Champion Edition (for PC) 3.5 Good In February 2016, Street Fighter V arrived on PC with many flaws that detracted from the stellar gameplay, including awful server instability, no true single-player mode, and a surprisingly limited multiplayer Battle Lounge. However, over the course of the last few years, developer Capcom released several updates that addressed (most of) those issues while also adding new stages and playable characters.Street Fighter V: Champion Edition, with its fresh and returning characters, new fight systems (like the cool V-Skills and V-Triggers mechanics), interactive stages, Cinematic Story Mode, and cross-platform play with PlayStation 4 owners, finally makes the one-on-one fighting game a title to pick up even for gamers who don't have Evo dreams. Street Fighter V: Champion Edition (for PC) review Street Fighter 6 Street Fighter 6 (for PC) 5.0 Outstanding Following Street Fighter V's lukewarm reception, Capcom had much to prove with Street Fighter 6. Thankfully, the developer not only righted the previous title's wrongs, but exceeded expectations by including nearly everything that fans would want in a contemporary fighting game.The title's powered by the new Drive Gauge, a meter that's full and ready for action at the beginning of each round. With the Drive Gauge, you can unleash the Drive Impact, Drive Parry, Drive Reversal, Drive Rush, and Overdrive moves (read our review for a breakdown of each one). It, along with the Dynamic and Modern control schemes, gives you more combat flexibility than any previous Street Fighter game. The result is one of the best fighters ever crafted, one that enables hype-fueled moments in casual and competitive play. Street Fighter 6 (for PC) review Tekken 7 Tekken 7 (for PC) 4.5 Excellent Tekken 7, like the main-line Tekken games that came before it, is a tale of fathers and sons attempting to murder each other to purge the Mishima clan of the Devil Gene, a magical bit of DNA that transforms certain people into hell spawn.The excellent combat accentuates the narrative ridiculousness. Like its predecessors, Tekken 7 is a fighting game that features simple, limb-mapped controls, massive character move sets, and numerous juggles that let you keep a combo flowing, if you're skilled enough to input the correct move at the right moment. With Tekken 7, the series receives super moves (Rage Arts) and enhanced, special attacks that can blow through an opponent's attack (Power Crush).Tekken 7 is an incredibly tense game of jabs, feints, and sidesteps, because any hit may lead to a long combo sting. Factor in characters with move sets that emulate real martial arts, interactive stages that let you knock people through floors and walls, and terrific slowdown effects that happen when both fighters' health bars are in the red and they perform close-quarter melee attacks, and you have a fighting game that's essentially an interactive martial arts flick. Ultimate Marvel vs. Capcom 3 Ultimate Marvel vs. Capcom 3 (for PC) 3.5 Good Ultimate Marvel vs. Capcom 3 pits Marvel's superheroes against Capcom's video game characters in a frantic 3-vs.-3, tag team brawl. The 48-character headcount is impressive, but it's the individual characters and visual aesthetic that truly make the game shine (unlike its Infinite sequel).Marvel's side has several popular and obscure characters, including Captain America, Iron Man, Iron Fist, and She-Hulk, and Spider-Man. Capcom's side mainly comprises characters from the company's fighting and action games, including Final Fight's Mike Haggar and Street Fighter's Ryu. The comic book-style graphics, with their bright colors and heavy black lines, gives Ultimate Marvel vs. Capcom 3 an eye-popping look.In terms of gameplay, Ultimate Marvel vs. Capcom 3 builds upon its Marvel vs. Capcom 3: Fate of Two Worlds predecessor by including a three-button control scheme, the momentum-changing X-Factor mechanic, and retooled aerial combat. Ultra Street Fighter IV Ultra Street Fighter IV (for PC) 4.5 Excellent Ultra Street Fighter IV marks Capcom's fourth version of Street Fighter IV and the third version available on the Steam platform. Like vanilla Street Fighter IV and Super Street Fighter IV, Ultra's combat is centered on Focus Attacks, a move that lets your character tank a blow and unleash a counterattack.This final iteration adds five new characters (Decapre, Elena, Hugo, Poison, and Rolento), six new stages, a YouTube upload option, Edition Select (which lets you pick different versions of characters, based on their past Street Fighter IV iterations), and Double Ultra (which makes a character's Ultra Combos available simultaneously, in exchange for reduced damage).It's Street Fighter IV's best and meatiest update, though some balance issues prove a bit irritating in play. Still, Ultra Street Fighter IV is an excellent, competitive one-on-one fighting game.

New Research Scientists Use DNA to Trace Early Humans’ Footsteps From Asia to South America Over thousands of years, humans from Eurasia trekked more than 12,400 miles to eventually reach the southernmost tip of South America, a new genetic investigation suggests Researchers have used genomic sequencing to trace what they’re calling the “longest migration out of Africa.” Nanyang Technological University Tens of thousands of years ago, Homo sapiens embarked on a major migration out of Africa and began settling around the world. But exactly how, when and where humans expanded has long been a source of debate. Now, researchers have used genomic sequencing to trace what they’re calling the “longest migration out of Africa.” Over the course of many generations and thousands of years, humans from Eurasia trekked more than 12,400 miles to eventually reach the southernmost tip of South America, according to a new paper published in the journal Science. In addition to providing insight into human expansion throughout the Americas, the analysis also sheds new light on health differences between populations. In the future, the researchers hope their work will contribute to personalized medical care based on an individual’s genetic profile. “[It is] only after we know the entire genetic makeup of humanity that we can provide precision medicine that is specific to the needs of every ethnic group, in particular, those that have become endangered and are on the brink of going extinct,” co-author Stephan Schuster, a genomicist at Nanyang Technological University in Singapore, tells the Straits Times’ Judith Tan. #NTUsg researchers: Early Asians made the longest human migration in prehistory Watch on For the study, an international team of scientists analyzed the genomes of 1,537 individuals from 139 ethnic groups in South America and Northeast Eurasia. Comparing this DNA allowed them to reconstruct the human migration from Asia to South America, following the “genetic footprints left behind by the early settlers,” as lead author Elena Gusareva, a biologist at Nanyang Technological University, tells Cosmos magazine’s Evrim Yazgin. Modern humans arrived in northern Eurasia around 45,000 years ago. By roughly 31,600 years ago, they had migrated east toward Beringia, the land bridge connecting Asia and North America in what is now the Bering Strait. From there, they walked into present-day Alaska. They expanded across North America and eventually headed into South America, reaching the continent’s northwest tip around 14,000 years ago. “Our findings show that Native Americans are descendants of Asian populations, particularly from the West Beringian region,” says study co-author Kim Hie Lim, a genomicist at Nanyang Technological University, to the South China Morning Post’s Victoria Bela. This South American group then split into four genetic lineages, the researchers found. One population headed east toward the Dry Chaco region, while another went south to Patagonia. One climbed up into the Andes Mountains, while another remained in the Amazon basin. Once the groups split off, they became isolated by the continent’s geography, which reduced their genetic diversity. More specifically, the researchers found a reduced diversity of human leukocyte antigen (HLA) genes, which help support immune health. Reduced genetic diversity may have made these early South Americans more susceptible to diseases introduced by European colonists, the researchers posit. “Understanding how ancient populations moved and settled not only helps us understand human history, but also explains how their immune systems adapted to different environments,” Kim tells the Borneo Bulletin. Data used in the study came from GenomeAsia 100K, a large-scale project that aims to sequence 100,000 Asian human genomes. “Most existing medicines were developed based on studies of European populations, often excluding Indigenous populations,” Kim tells Live Science’s Kristina Killgrove. “It is critical to provide tailored healthcare and disease prevention strategies that consider their specific genetic profiles.” Get the latest stories in your inbox every weekday.

Ancient sloths came in a variety of sizesDiego Barletta A cooling, drying climate turned sloths into giants – before humans potentially drove the huge animals to extinction. Today’s sloths are small, famously sluggish herbivores that move through the tropical canopies of rainforests. But for tens of millions of years, South America was home to a dizzying diversity of sloths. Many were ground-dwelling giants, with some behemoths approaching 5 tonnes in weight. Advertisement That staggering size range is of particular interest to Alberto Boscaini at the University of Buenos Aires in Argentina and his colleagues. “Body size correlates with everything in the biological traits of an animal,” says Boscaini. “This was a promising way of studying [sloth] evolution.” Boscaini and his colleagues compiled data on the physical features, DNA and proteins of 67 extinct and living sloth genera – groups of closely related species – to develop a family tree showing their evolutionary relationships. Unmissable news about our planet delivered straight to your inbox every month. Sign up to newsletter The researchers then took this evolutionary history, which covered a span of 35 million years, and added information about each sloth’s habitat, diet and lifestyle. They also studied trends in body-size evolution, making body mass estimates of 49 of the ancient and modern sloth groups. The results suggest sloth body-size evolution was heavily influenced by climatic and habitat changes. For instance, some sloth genera began living in trees – similar to today’s sloths – and shrank in body size as they did so. Meanwhile, three different lineages of sloths independently evolved elephantine proportions – and it seems they did this within the last several million years, as the planet cooled and the growth of the Andes mountains made South America more arid. “Gigantism is more closely associated with cold and dry climates,” says team member Daniel Casali at the University of São Paulo, Brazil. Many of these diverse sloths disappeared during two stages: one around 12,000 years ago and the other around 6000 years ago, says Boscaini. “This matches with the expansion of Homo sapiens, first over the entire American supercontinent, and later in the Caribbean,” he says — which is where some giant sloths lived. Notably, the only surviving sloth species live in trees so are much harder for humans to hunt than massive ground sloths. The idea that humans were the death blow for ancient megafauna is well-supported, says Thaís Rabito Pansani at the University of New Mexico, who wasn’t involved in the study. “However, in science, we need several lines of evidence to reinforce our hypotheses, especially in unresolved and highly debated issues such as the extinction of megafauna,” she says. The new evidence shores up this story. “Sloths were thriving for most of their history,” says Casali. “[The findings] teach us how a very successful [group] can become so vulnerable very quickly.” Journal reference:Science DOI: 10.1126/science.adu0704 Topics:evolution

Horses migrated back and forth repeatedly between North America and Eurasia, during the Late Pleistocene. But when a warming environment flooded a land bridge, it cut off travel between the continents, leading to both the decline of the horses in North America and changes to the land caused by their absence, according to a report in the journal Science by an international team that includes 18 indigenous scientists.The team drew upon both tribal knowledge of environmental events as well as the cutting-edge scientific tools. The study both provides a glimpse of the horse’s history on two continents as well as ways to think about conservation in the future.Grazing and Roaming HorsesHorses, when unfenced, tend to graze in a flower petal pattern around a water source. When the food runs out, they move on to another area and repeat the process. Along the way, they do what horses do — fertilize the land. Horse droppings often contain seeds and attract bugs. Some seeds grow into plants. Some bugs attract animals. When the horse disappears from an area, this process stops.“In this way, the horse is not only responding to change, it is also actually part of the change,” says Yvette Running Horse Collin, a member of the Lakota Nation, a scientist at the University of Toulouse, France, and an author of the paper. “If provided the opportunity, you would find that horses today would also move great distances in response to changes in the environment. In doing so, they provide a great service to all life. Where the horse goes, other life follows.”Ancient Horse FossilsHorses were both agents and objects of change over the past 50,000 years. The scientific team analyzed genomes from 67 ancient horse fossils found across Beringia, Siberia, and continental North America, dated them with radiocarbon and isotopes, and compared the data to all known lineages.The study reveals a wider range of horse genetic diversity during the late Pleistocene period than we see today, as well as long, bi-directional transcontinental migration. For example, some lineages found in Siberian and Iberian fossils show genetic traces of North American horses.The study suggests that not only did the closing of the bridge between continents affect the North American horse population, but other effects of warming made an impact as well. As eras shifted from Pleistocene to Holocene, grasslands turned to wet, boggy tundra unsuitable for horses to graze and difficult for them to travel upon.Climate and Geological ChangeThe authors emphasize that the study shows the necessity of looking at whole systems, not just an individual species to understand the past impacts of climate and geological change. The same applies to future conservation efforts.“In order to have successful conservation efforts for the horse, you must also put in place successful conservation efforts for other forms of life," Collin says. “It is for this reason that one of the research outcomes of this study is to suggest the creation of corridors that would allow life to move — together — as needed."Some tribes involved in the study intend to put those concepts into practice in the Black Hills of South Dakota. They will provide scientific measures of those efforts and intend to share the results with the wider scientific community.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Before joining Discover Magazine, Paul Smaglik spent over 20 years as a science journalist, specializing in U.S. life science policy and global scientific career issues. He began his career in newspapers, but switched to scientific magazines. His work has appeared in publications including Science News, Science, Nature, and Scientific American.

Australia and South America weren’t always so separate. At one time, many millions of years ago, these two continents were connected, along with others, in the southern supercontinent of Gondwana. Gondwana was a warm, forested place — a perfect home for tree frogs. In fact, the supercontinent fostered the common ancestor of the Australian pelodryadid frogs and the South American phyllomedusid frogs that are still seen, stuck to leaves and branches, today. But when did this common tree frog ancestor appear, and when did it diverge into these two separate frog families?A new study published in the Journal of Vertebrate Paleontology provides some answers. Identifying a new species of Australian tree frog from the Early Eocene around 55 million years ago, the study suggests that the Australian and South American tree frog lineages split apart at around that time, too, or even earlier than that. All in all, the study rethinks the timeline of tree frog evolution and suggests that these lineages are a lot older than traditionally thought.The Australian-South American Frog SeparationTo be sure, the new study isn’t the first to investigate the divergence of the Australian and South American tree frogs. By following the genetic transformations of these two families over time, prior molecular studies have shown, for instance, that the pelodryadids and the phyllomedusids split apart approximately 33 million years ago.The fossil record has supported that timing in the past, with the earliest Australian tree frog fossils previously appearing in Australia after 33 million years ago, in the Late Oligocene and the Early Miocene epochs about 26 and 23 million years ago. But the new species undermines this timeline, suggesting that the separation of Australian and South American tree frogs actually occurred around 55 million years ago at a minimum, or at least around 22 million years earlier than previously thought. The new species, named Litoria tylerantiqua, is now the earliest identified species of Australian tree frog there is. Represented by fossilized pelvic bones from the Murgon fossil site in Queensland, Australia, the pelodryadid species is approximately 55 million years old, or about 30 million years older than any other Australian tree frog found in the fossil record. “While molecular studies are important for understanding the evolutionary relationships of different groups of animals, these studies should be calibrated using knowledge from the fossil record,” said Roy Farman, the lead study author and a lecturer at the University of New South Wales, according to a press release. “In this case, the fossil record provides a more accurate time for separation of the southern world’s tree frogs.”Tree Frogs, Fossilized and PickledThree fossilized ilia (pelvic bones) represent a new species of Australian tree frog, Litoria tylerantiqua. (Image Credit: UNSW Sydney/Roy Farman) To confirm the species’ identification as a pelodryadid, the study authors compared the pelvises of the new species with the pelvises of pickled frogs, including Australian and South American tree frogs, from museums in Australia. “We were able to determine from the shape of the fossil ilia — one of three bones that make up each side of the pelvis — that this new Murgon species of frog is more closely related to the Australian tree frogs (pelodryadids) than the South American tree frogs (phyllomedusids),” Farman said in the release. Though the structure of the pelvic bones from the new species was relatively simple to study, the structure of the bones from the pickled species was not. “We had a real problem at the start of this study,” Farman added in the release, because the bones of the pickled specimens were “invisible,” being obscured by the specimens’ soft tissues. “Museums understandably want to ensure these often unique or rare pickled specimens remain intact for molecular studies because DNA can be obtained from their soft tissues,” Farman said in the release. “This meant that instead of [skeletonizing] these specimens, we needed instead to make CT scans of them, enabling us to create 3D models of their otherwise invisible skeletons.”The new species is named after the Australian herpetologist Michael Tyler, who was famous for studying the fossil record of Australian frogs and toads. “It is only fitting to name Australia’s earliest tree frog in [honor] of a man who was a giant in Australian frog research,” Farman said in the release. Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:Sam Walters is a journalist covering archaeology, paleontology, ecology, and evolution for Discover, along with an assortment of other topics. Before joining the Discover team as an assistant editor in 2022, Sam studied journalism at Northwestern University in Evanston, Illinois.

An illustration of what the Amniote (early reptile) would look like from 350 million years ago. CREDIT: Martin Ambrozik. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. One of the most impactful stories in evolution is getting a rewrite, thanks to the exciting discovery of the earliest known set of reptile footprints. Craig A. Eury and John Eason, two amateur paleontologists exploring the fossil-rich Snowy Plains Formation in Australia, found a rock with an intriguing set of fossilized prints. They brought the intriguing specimen to professional paleontologists, who soon discovered that the roughly 356 million-year-old fossilized claw prints likely belong to an amniote–an early reptile relative.  Though small in stature, amniotes were a large evolutionary leap forward towards land-dwelling, four-limbed animals called tetrapods. The age of these prints suggest that amniotes evolved millions of years earlier than expected, according to a study published May 14 in the journal Nature.  “I’m stunned,” Per Ahlberg, a paleontologist at Uppsala University in Sweden who coordinated the study, said in a statement. “A single track-bearing slab, which one person can lift, calls into question everything we thought we knew about when modern tetrapods evolved.” When fish grew legs Tetrapods include all vertebrates with four limbs that primarily live on land, including everything from frogs to turtles to eagles, to tigers to humans. Their story began as fish left the water between 390 and 360 million years ago. Their descendants began to diversify into the ancestors of modern amphibians and amniotes–the group that includes birds, reptiles, and mammals. Originally, the timeline for how this massive diversification of life occurred was fairly clear-cut. The first tetrapods evolved roughly 390 million years ago during the Devonian period. Amniotoes and the earliest members of the modern groups of animals we see today followed fishapods during the Carboniferous period. Previously, the earliest amniote fossils dated back to  about 320 million years old to the late Carboniferous. Based on this new evidence, researchers concluded the start of the point on the evolutionary tree where the ancestors of amphibians and amniotes split actually happened in the earliest days of the Carboniferous or 356 million years ago.   Proof in the prints The newly discovered 356 million-year-old sandstone slab from this new study potentially changes this entire timeline by about 35 to 40 million years. The well-preserved footprints of long-toed feet with distinct claw impressions at the tips dot the stone and are the earliest known clawed footprints. Two sets of tracks were identified on the stone, seemingly from the same animal.  Footprints are important for paleontologists, as they can indicate the types of behaviors an extinct animal may have exhibited. The team compared the ancient tracks with a modern water monitor (Varanus salvator) lizard, since they have similarly shaped feet to what is seen on the footprints. They examined the spacing between the front and hind footprints against that living lizard’s feet. With these measurements, the team estimates that the ancient amniote may have been around 2.5 feet long, but that the exact proportions of the animal are still unknown. “Claws are present in all early amniotes, but almost never in other groups of tetrapods,” Ahlberg said. “The combination of the claw scratches and the shape of the feet suggests that the track maker was a primitive reptile.” If this new interpretation is correct, it pushes the origin of reptiles, and thus amniotes as a whole, back by roughly 40 million years to the earliest Carboniferous. A new set of fossil reptile footprints uncovered all the way across the globe in Poland are also detailed in the study and bolster the evidence. These European footprints are not as old as the ones from Australia, but are still older than previous specimens.  “The implications of this discovery for the early evolution of tetrapods are profound,” John Long, a study co-author and paleontologist at Flinders University in Australia, said. “All stem-tetrapod and stem-amniote lineages must have originated during the Devonian period – but tetrapod evolution proceeded much faster, and the Devonian tetrapod record is much less complete than we have believed.” A place on the evolutionary tree According to the team, this recalibration of the origin of reptiles has a ripple effect on the whole timeline of tetrapod evolution. Tetrapods must be older than even the earliest amniotes, since it has a deeper branching point on the evolutionary tree.  “It’s all about the relative length of different branches in the tree,” said Ahlberg. “In a family tree based on DNA data from living animals, branches will have different lengths reflecting the number of genetic changes along each branch segment. This does not depend on fossils, so it’s really helpful for studying phases of evolution with a poor fossil record.” The fossil trackways with the different tracks on it highlighted. CREDIT: Flinders University The team believes that amphibians and ammonites split apart further into the Devonian period and were likely a contemporary of the primitive, transitional “fishapod” called Tiktaalik. This evidence indicates that a diverse group of tetrapods existed when only transitional “fishapods” were believed to be dragging themselves around muddy shorelines and starting to explore the land.  If this new theory holds, it is likely that the evolution of tetrapods from aquatic creatures to those fully living on land may have occurred even faster than previously believed.   “The Australian footprint slab is about 50 cm [1.5 feet] across,” said Ahlberg, “and at present it represents the entire fossil record of tetrapods from the earliest Carboniferous of Gondwana – a gigantic supercontinent comprising Africa, South America, Antarctica, Australia and India. Who knows what else lived there?”   “The most interesting discoveries are yet to come and that there is still much to be found in the field,” added study co-author and paleontologist Grzegorz Niedźwiedzki. “These footprints from Australia are just one example of this.” 

During an excavation, amidst the Patagonian winds and hard rock, a fossil began to turn green. It was an unexpected reaction: the adhesive applied to protect the bones, fragile after millions of years beneath the ice, had interacted with plant matter trapped in the rock’s cracks. This greenish hue earned the fossil the nickname Fiona, like the ogre from Shrek.But Fionais much more than a ogre-themed name. It is the first complete ichthyosaur ever excavated in Chile and, even more remarkably, the only known pregnant female from the Hauterivian — a stage of the Early Cretaceous dating back 131 million years. Her skeleton, discovered at the edge of the Tyndall Glacier in Torres del Paine National Park — an area increasingly exposed by glacial retreat — belongs to the species Myobradypterygius hauthali, originally described in Argentina from fragmentary remains.The discovery, led by Judith Pardo-Pérez, a researcher at the University of Magallanes and the Cabo de Hornos International Center (CHIC), and published in the Journal of Vertebrate Paleontology, offers an unprecedented glimpse into ancient marine life — from how these majestic reptiles reproduced to how they adapted to oceans vastly different from those of today.An Ichthyosaur Maternity Ward in Patagonia(Image Courtesy of Irene Viscor)So far, 88 ichthyosaurs have been found on the Tyndall Glacier. Most of them are adults and newborns. Two key facts stand out: food was abundant, and no other predators were competing with them.Fiona, who measures nearly 13 feet long, is still encased in five blocks of rock. Despite the challenge, she was transported to a local clinic, where CT scans allowed researchers to study her skull and body. Her species was identified thanks to one of her fins. “There’s no other like it in the world,” says Pardo-Pérez. The limbs were remarkably elongated, suggesting this animal was built for long-distance swimming.Inside her, there were more surprises. One of them was her stomach contents, which revealed what may have been her last meal: tiny fish vertebrae. But the most striking find was a fetus, about 20 inches long, already in a position to be born.“We believe these animals came to Magallanes — the southern tip of Chilean Patagonia — from time to time to give birth, because it was a safe refuge,” Pardo-Pérez says. “We don't know how long they stayed, but we do know that mortality was high during the first few days of life.”One of the big unanswered questions is where they went next, as there are no records of Myobradypterygius hauthali, apart from a piece of fin found in Argentina. The most abundant remains come from southern Germany, but those date back to the Jurassic period, meaning they’re older.Palaeontologist Erin Maxwell suggests, “In many modern ecosystems, species migrate to higher latitudes during the summer to take advantage of seasonally abundant resources and then move to lower latitudes in winter to avoid harsh conditions,” she explains. “We believe Mesozoic marine reptiles may have followed similar seasonal patterns.”Sea Dragon GraveyardThe environment where Fiona was discovered — dubbed the "sea dragon graveyard" — also has much to reveal.According to geologist Matthew Malkowski of the University of Texas at Austin, the Hauterivian age is particularly intriguing because it coincided with major planetary changes: the breakup of continents, intense volcanic episodes, and phenomena known as "oceanic anoxic events," during which vast areas of the ocean were depleted of dissolved oxygen for hundreds of thousands of years.One such poorly understood event, the Pharaonic Anoxic Event, occurred around 131 million years ago, near the end of the Hauterivian, and still raises questions about its true impact on marine life. “We don't have a firm grasp of how significant these events were for marine vertebrates, and geological records like that of the Tyndall Glacier allow us to explore the relationship between life, the environment, and Earth’s past conditions,” Malkowski notes.Evolution of IchthyosaursReconstruction of Fiona. (Image Courtesy of Mauricio Álvarez)Don't be misled by their body shape. “Ichthyosaurs are not related to dolphins,” clarifies Pardo-Pérez. Although their hydrodynamic silhouettes may look nearly identical, the former were marine reptiles, while the latter are mammals. This resemblance results from a phenomenon known as convergent evolution: when species from different lineages develop similar anatomical features to adapt to the same environment.Ichthyosaurs evolved from terrestrial reptiles that, in response to ecological and climatic changes, began spending more time in the water until they fully adapted to a marine lifestyle. However, they retained traces of their land-dwelling ancestry, such as a pair of hind flippers — absent in dolphins — passed down from their walking forebears. They lived and thrived in prehistoric oceans for about 180 million years, giving them ample time to refine a highly specialized body: their forelimbs and hindlimbs transformed into flippers; they developed a crescent-shaped tail for propulsion, a dorsal fin for stability, and a streamlined body to reduce drag in the water. Remarkably, like whales and dolphins, “ichthyosaurs had a thick layer of blubber as insulation to maintain a higher body temperature than the surrounding seawater and gave birth to live young, which meant they didn’t need to leave the water to reproduce,” explains Maxwell.Whales and dolphins also descend from land-dwelling ancestors, but their transition happened over a comparatively short evolutionary timespan, especially when measured against the long reign of the ichthyosaurs. “Their evolution hasn't had as much time as that of ichthyosaurs,” notes Pardo-Pérez. “And yet, they look so similar. That’s the wonderful thing about evolution.”Read More: Did a Swimming Reptile Predate the Dinosaurs?Fossils on the Verge of DisappearanceOne of the key factors behind the remarkable preservation of the fossils found in the Tyndall Glacier is the way they were buried. According to Malkowski, Fiona and her contemporaries were either trapped or swiftly covered by underwater landslides and turbidity currents — geological processes that led to their sudden entombment.But the good fortune that protected them for millions of years may now be running out. As the glacier retreats, exposing fossils that were once unreachable, those same remains are now vulnerable to wind, rain, and freeze-thaw cycles, which crack the surrounding rock. As vegetation takes hold, roots accelerate erosion and eventually conceal the fossils once again.“While climate change has allowed these fossils to be studied, continued warming will also eventually lead to their loss,” Maxwell warns. In Fiona’s story, scientists find not only a record of ancient life, but also a warning etched in stone and bone: what time reveals, climate can reclaim.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:María de los Ángeles Orfila is a science journalist based in Montevideo, Uruguay, focusing on long-form storytelling. Her work has appeared in Discover Magazine, Science, National Geographic, among other outlets, and in leading Uruguayan publications such as El País and El Observador. She was a fellow in the 2023 Sharon Dunwoody Mentoring Program by The Open Notebook and often explores the intersections of science, culture, and Latin American identity.