html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd" 19 shortlisted projects for the 2025 Award cycle were revealed by the Aga Khan Award for Architecture (AKAA). A portion of the $1 million prize, one of the biggest in architecture, will be awarded to the winning proposals. Out of the 369 projects nominated for the 16th Award Cycle (2023-2025), an independent Master Jury chose the 19 shortlisted projects from 15 countries.The nine members of the Master Jury for the 16th Award cycle include Azra Akšamija, Noura Al-Sayeh Holtrop, Lucia Allais, David Basulto, Yvonne Farrell, Kabage Karanja, Yacouba Konaté, Hassan Radoine, and Mun Summ Wong.His Late Highness Prince Karim Aga Khan IV created the Aga Khan Award for Architecture in 1977 to recognize and promote architectural ideas that effectively meet the needs and goals of communities where Muslims are a major population. Nearly 10,000 construction projects have been documented since the award's inception 48 years ago, and 128 projects have been granted it. The AKAA's selection method places a strong emphasis on architecture that stimulates and responds to people's cultural ambitions in addition to meeting their physical, social, and economic demands.The Aga Khan Award for Architecture is governed by a Steering Committee chaired by His Highness the Aga Khan. The other members of the Steering Committee are Meisa Batayneh, Principal Architect, Founder, maisam architects and engineers, Amman, Jordan; Souleymane Bachir Diagne, Professor of Philosophy and Francophone Studies, Columbia University, New York, United States of America; Lesley Lokko, Founder & Director, African Futures Institute, Accra, Ghana; Gülru Necipoğlu, Director and Professor, Aga Khan Program for Islamic Architecture, Harvard University, Cambridge, United States of America; Hashim Sarkis, Founder & Principal, Hashim Sarkis Studios (HSS); Dean, School of Architecture and Planning, Massachusetts Institute of Technology, Cambridge, United States of America; and Sarah M. Whiting, Partner, WW Architecture; Dean and Josep Lluís Sert Professor of Architecture, Graduate School of Design, Harvard University, Cambridge, United States of America. Farrokh Derakhshani is the Director of the Award.Examples of outstanding architecture in the areas of modern design, social housing, community development and enhancement, historic preservation, reuse and area conservation, landscape design, and environmental enhancement are recognized by the Aga Khan Award for Architecture.Building plans that creatively utilize local resources and relevant technologies, as well as initiatives that could spur such initiatives abroad, are given special consideration. It should be mentioned that in addition to honoring architects, the Award also recognizes towns, builders, clients, master craftspeople, and engineers who have contributed significantly to the project.Projects had to be completed between January 1, 2018, and December 31, 2023, and they had to have been operational for a minimum of one year in order to be eligible for consideration in the 2025 Award cycle. The Award is not available for projects that His Highness the Aga Khan or any of the Aga Khan Development Network (AKDN) institutions have commissioned.See the 19 shortlisted projects with their short project descriptions competing for the 2025 Award Cycle:Khudi Bari. Image © Aga Khan Trust for Culture / City Syntax (F. M. Faruque Abdullah Shawon, H. M. Fozla Rabby Apurbo)BangladeshKhudi Bari, in various locations, by Marina Tabassum ArchitectsMarina Tabassum Architects' Khudi Bari, which can be readily disassembled and reassembled to suit the needs of the users, is a replicable solution for displaced communities impacted by geographic and climatic changes.West Wusutu Village Community Centre. Image © Aga Khan Trust for Culture / Dou Yujun (photographer)ChinaWest Wusutu Village Community Centre, Hohhot, Inner Mongolia, by Zhang PengjuIn addition to meeting the religious demands of the local Hui Muslims, Zhang Pengju's West Wusutu Village Community Centre in Hohhot, Inner Mongolia, offers social and cultural spaces for locals and artists. Constructed from recycled bricks, it features multipurpose indoor and outdoor areas that promote communal harmony.Revitalisation of Historic Esna. Image © Aga Khan Trust for Culture / Ahmed Salem (photographer)EgyptRevitalisation of Historic Esna, by Takween Integrated Community DevelopmentBy using physical interventions, socioeconomic projects, and creative urban planning techniques, Takween Integrated Community Development's Revitalization of Historic Esna tackles the issues of cultural tourism in Upper Egypt and turns the once-forgotten area around the Temple of Khnum into a thriving historic city.The Arc at Green School. Image © Aga Khan Trust for Culture / Andreas Perbowo Widityawan (photographer)IndonesiaThe Arc at Green School, in Bali, by IBUKU / Elora HardyAfter 15 years of bamboo experimenting at the Green School Bali, IBUKU/Elora Hardy created The Arc at Green School. The Arc is a brand-new community wellness facility built on the foundations of a temporary gym. High-precision engineering and regional handicraft are combined in this construction.Islamic Centre Nurul Yaqin Mosque. Image © Aga Khan Trust for Culture / Andreas Perbowo Widityawan (photographer)IndonesiaIslamic Centre Nurul Yaqin Mosque, in Palu, Central Sulawesi, by Dave Orlando and Fandy GunawanDave Orlando and Fandy Gunawan built the Islamic Center Nurul Yaqin Mosque in Palu, Central Sulawesi, on the location of a previous mosque that was damaged by a 2018 tsunami. There is a place for worship and assembly at the new Islamic Center. Surrounded by a shallow reflecting pool that may be drained to make room for more guests, it is open to the countryside.Microlibrary Warak Kayu. Image © Aga Khan Trust for Culture / Andreas Perbowo Widityawan (photographer)IndonesiaMicrolibraries in various cities, by SHAU / Daliana Suryawinata, Florian HeinzelmannFlorian Heinzelmann, the project's initiator, works with stakeholders at all levels to provide high-quality public spaces in a number of Indonesian parks and kampungs through microlibraries in different towns run by SHAU/Daliana Suryawinata. So far, six have been constructed, and by 2045, 100 are planned.Majara Residence. Image © Aga Khan Trust for Culture / Deed Studio (photographer)IranMajara Complex and Community Redevelopment, in Hormuz Island by ZAV Architects / Mohamadreza GhodousiThe Majara Complex and Community Redevelopment on Hormuz Island, designed by ZAV Architects and Mohamadreza Ghodousi, is well-known for its vibrant domes that offer eco-friendly lodging for visitors visiting Hormuz's distinctive scenery. In addition to providing new amenities for the islanders who visit to socialize, pray, or utilize the library, it was constructed by highly trained local laborers.Jahad Metro Plaza. Image © Aga Khan Trust for Culture / Deed Studio (photographer)IranJahad Metro Plaza in Tehran, by KA Architecture StudioKA Architecture Studio's Jahad Metro Plaza in Tehran was constructed to replace the dilapidated old buildings. It turned the location into a beloved pedestrian-friendly landmark. The arched vaults, which are covered in locally manufactured brick, vary in height to let air and light into the area they are protecting.Khan Jaljulia Restoration. Image © Aga Khan Trust for Culture / Mikaela Burstow (photographer)IsraelKhan Jaljulia Restoration in Jaljulia by Elias KhuriElias Khuri's Khan Jaljulia Restoration is a cost-effective intervention set amidst the remnants of a 14th-century Khan in Jaljulia. By converting the abandoned historical location into a bustling public area for social gatherings, it helps the locals rediscover their cultural history.Campus Startup Lions. Image © Aga Khan Trust for Culture / Christopher Wilton-Steer (photographer)KenyaCampus Startup Lions, in Turkana by Kéré ArchitectsKéré Architecture's Campus Startup Lions in Turkana is an educational and entrepreneurial center that offers a venue for community involvement, business incubation, and technology-driven education. The design incorporates solar energy, rainwater harvesting, and tall ventilation towers that resemble the nearby termite mounds, and it was constructed using local volcanic stone.Lalla Yeddouna Square. Image © Aga Khan Trust for Culture / Amine Houari (photographer)MoroccoRevitalisation of Lalla Yeddouna Square in the medina of Fez, by Mossessian Architecture and Yassir Khalil StudioMossessian Architecture and Yassir Khalil Studio's revitalization of Lalla Yeddouna Square in the Fez medina aims to improve pedestrian circulation and reestablish a connection to the waterfront. For the benefit of locals, craftspeople, and tourists from around the globe, existing buildings were maintained and new areas created.Vision Pakistan. Image © Aga Khan Trust for Culture / Usman Saqib Zuberi (photographer)PakistanVision Pakistan, in Islamabad by DB Studios / Mohammad Saifullah SiddiquiA tailoring training center run by Vision Pakistan, a nonprofit organization dedicated to empowering underprivileged adolescents, is located in Islamabad by DB Studios/Mohammad Saifullah Siddiqui. Situated in a crowded neighborhood, this multi-story building features flashy jaalis influenced by Arab and Pakistani crafts, echoing the city's 1960s design.Denso Hall Rahguzar Project. Image © Aga Khan Trust for Culture / Usman Saqib Zuberi (photographer)PakistanDenso Hall Rahguzar Project, in Karachi by Heritage Foundation Pakistan / Yasmeen LariThe Heritage Foundation of Pakistan/Yasmeen Lari's Denso Hall Rahguzar Project in Karachi is a heritage-led eco-urban enclave that was built with low-carbon materials in response to the city's severe climate, which is prone to heat waves and floods. The freshly planted "forests" are irrigated by the handcrafted terracotta cobbles, which absorb rainfall and cool and purify the air.Wonder Cabinet. Image © Aga Khan Trust for Culture / Mikaela Burstow (photographer)PalestineWonder Cabinet, in Bethlehem by AAU AnastasThe architects at AAU Anastas established Wonder Cabinet, a multifunctional, nonprofit exhibition and production venue in Bethlehem. The three-story concrete building was constructed with the help of regional contractors and artisans, and it is quickly emerging as a major center for learning, design, craft, and innovation.The Ned. Image © Aga Khan Trust for Culture / Cemal Emden (photographer)QatarThe Ned Hotel, in Doha by David Chipperfield ArchitectsThe Ministry of Interior was housed in the Ned Hotel in Doha, which was designed by David Chipperfield Architects. Its Middle Eastern brutalist building was meticulously transformed into a 90-room boutique hotel, thereby promoting architectural revitalization in the region.Shamalat Cultural Centre. Image © Aga Khan Trust for Culture / Hassan Al Shatti (photographer)Saudi ArabiaShamalat Cultural Centre, in Riyadh, by Syn Architects / Sara Alissa, Nojoud AlsudairiOn the outskirts of Diriyah, the Shamalat Cultural Centre in Riyadh was created by Syn Architects/Sara Alissa, Nojoud Alsudairi. It was created from an old mud home that artist Maha Malluh had renovated. The center, which aims to incorporate historic places into daily life, provides a sensitive viewpoint on heritage conservation in the area by contrasting the old and the contemporary.Rehabilitation and Extension of Dakar Railway Station. Image © Aga Khan Trust for Culture / Sylvain Cherkaoui (photographer)SenegalRehabilitation and Extension of Dakar Railway Station, in Dakar by Ga2DIn order to accommodate the passengers of a new express train line, Ga2D extended and renovated Dakar train Station, which purposefully contrasts the old and modern buildings. The forecourt was once again open to pedestrian traffic after vehicular traffic was limited to the rear of the property.Rami Library. Image © Aga Khan Trust for Culture / Cemal Emden (photographer)TürkiyeRami Library, by Han Tümertekin Design & ConsultancyThe largest library in Istanbul is the Rami Library, designed by Han Tümertekin Design & Consultancy. It occupied the former Rami Barracks, a sizable, single-story building with enormous volumes that was constructed in the eighteenth century. In order to accommodate new library operations while maintaining the structure's original spatial features, a minimal intervention method was used.Morocco Pavilion Expo Dubai 2020. Image © Aga Khan Trust for Culture / Deed Studio (photographer)United Arab EmiratesMorocco Pavilion Expo Dubai 2020, by Oualalou + ChoiOualalou + Choi's Morocco Pavilion Expo Dubai 2020 is intended to last beyond Expo 2020 and be transformed into a cultural center. The pavilion is a trailblazer in the development of large-scale rammed earth building techniques. Its use of passive cooling techniques, which minimize the need for mechanical air conditioning, earned it the gold LEED accreditation.At each project location, independent professionals such as architects, conservation specialists, planners, and structural engineers have conducted thorough evaluations of the nominated projects. This summer, the Master Jury convenes once more to analyze the on-site evaluations and choose the ultimate Award winners.The top image in the article: The Arc at Green School. Image © Aga Khan Trust for Culture / Andreas Perbowo Widityawan (photographer).> via Aga Khan Award for Architecture

The US is less than 250 years old, but some of its most important archaeological sites are older than the Viking seafarers, the Roman Empire, and the pyramids.Many help tell the story of how the first humans came to North America. It's still a mystery exactly how and when people arrived, though it's widely believed they crossed the Bering Strait at least 15,000 years ago."As we get further back in time, as we get populations that are smaller and smaller, finding these places and interpreting them becomes increasingly difficult," archaeologist Kenneth Feder told Business Insider. He's the author of "Ancient America: Fifty Archaeological Sites to See for Yourself."Some sites, like White Sands and Cooper's Ferry, have skeptics about the accuracy of their age. Still, they contribute to our understanding of some of the earliest Americans.Others are more recent and highlight the different cultures that were spreading around the country, with complex buildings and illuminating pictographs.Many of these places are open to the public, so you can see the US' ancient history for yourself. White Sands National Park, New Mexico Footprints at White Sands. National Park Service Prehistoric camels, mammoths, and giant sloths once roamed what's now New Mexico, when it was greener and damper.As the climate warmed around 11,000 years ago, the water of Lake Otero receded, revealing footprints of humans who lived among these extinct animals. Some even seemed to be following a sloth, offering a rare glimpse into ancient hunters' behavior.Recent research puts some of these fossilized footprints at between 21,000 and 23,000 years old. If the dates are accurate, the prints would predate other archaeological sites in the US, raising intriguing questions about who these people were and how they arrived in the Southwestern state."Where are they coming from?" Feder said. "They're not parachute dropping in New Mexico. They must have come from somewhere else, which means there are even older sites." Archaeologists simply haven't found them yet.While visitors can soak in the sight of the eponymous white sands, the footprints are currently off-limits. Meadowcroft Rockshelter, Pennsylvania The archeological dig at the Meadowcroft National Historic Site in 2013. AP Photo/Keith Srakocic In the 1970s, archaeologist James M. Adovasio sparked a controversy when he and his colleagues suggested stone tools and other artifacts found in southwestern Pennsylvania belonged to humans who had lived in the area 16,000 years ago.For decades, scientists had been finding evidence of human habitation that all seemed to be around 12,000 to 13,000 years old, belonging to the Clovis culture. They were long believed to have been the first to cross the Bering land bridge. Humans who arrived in North America before this group are often referred to as pre-Clovis.At the time, skeptics said that the radiocarbon dating evidence was flawed, AP News reported in 2016. In the years since, more sites that appear older than 13,000 years have been found across the US.Feder said Adovasio meticulously excavated the site, but there's still no clear consensus about the age of the oldest artifacts. Still, he said, "that site is absolutely a major, important, significant site." It helped archaeologists realize humans started arriving on the continent before the Clovis people.The dig itself is on display at the Heinz History Center, allowing visitors to see an excavation in person. Cooper's Ferry, Idaho Excavators at Cooper's Ferry in 2013. Loren Davis/Oregon State University One site that's added intriguing evidence to the pre-Clovis theory is located in western Idaho. Humans living there left stone tools and charred bones in a hearth between 14,000 and 16,000 years ago, according to radiocarbon dating. Other researchers put the dates closer to 11,500 years ago.These stemmed tools are different from the Clovis fluted projectiles, researchers wrote in a 2019 Science Advances paper.Some scientists think humans may have been traveling along the West Coast at this time, when huge ice sheets covered Alaska and Canada. "People using boats, using canoes could hop along that coast and end up in North America long before those glacial ice bodies decoupled," Feder said.Cooper's Ferry is located on traditional Nez Perce land, which the Bureau of Land Management holds in public ownership. Page-Ladson, Florida Divers search in the sediment at the Page-Ladson site. Texas A&M University via Getty Images In the early 1980s, former Navy SEAL Buddy Page alerted paleontologists and archaeologists to a sinkhole nicknamed "Booger Hole" in the Aucilla River. There, the researchers found mammoth and mastodon bones and stone tools.They also discovered a mastodon tusk with what appeared to be cut marks believed to be made by a tool. Other scientists have returned to the site more recently, bringing up more bones and tools. They used radiocarbon dating, which established the site as pre-Clovis."The stone tools and faunal remains at the site show that at 14,550 years ago, people knew how to find game, fresh water and material for making tools," Michael Waters, one of the researchers, said in a statement in 2016. "These people were well-adapted to this environment."Since the site is both underwater and on private property, it's not open to visitors. Paisley Caves, Oregon One of the Paisley Caves near Paisley, Oregon. AP Photo/Jeff Barnard Scientists study coprolites, or fossilized poop, to learn about the diets of long-dead animals. Mineralized waste can also reveal much more. In 2020, archaeologist Dennis Jenkins published a paper on coprolites from an Oregon cave that were over 14,000 years old.Radiocarbon dating gave the trace fossils' age, and genetic tests suggested they belonged to humans. Further analysis of coprolites added additional evidence that a group had been on the West Coast 1,000 years before the Clovis people arrived.Located in southcentral Oregon, the caves appear to be a piece of the puzzle indicating how humans spread throughout the continent thousands of years ago.The federal Bureau of Land Management owns the land where the caves are found, and they are listed on the National Register of Historic Places. Swan Point, Alaska Excavators working at the Swan Point site in June 2016. Charles Holmes/University of Alaska, Fairbanks Whenever people arrived in the Americas, they crossed from Siberia into Beringia, an area of land and sea between Russia and Canada and Alaska. Now it's covered in water, but there was once a land bridge connecting them.The site in Alaska with the oldest evidence of human habitation is Swan Point, in the state's eastern-central region. In addition to tools and hearths dating back 14,000 years, mammoth bones have been found there.Researchers think this area was a kind of seasonal hunting camp. As mammoths returned during certain times of the years, humans would track them and kill them, providing plentiful food for the hunter-gatherers.While Alaska may have a wealth of archaeological evidence of early Americans, it's also a difficult place to excavate. "Your digging season is very narrow, and it's expensive," Feder said. Some require a helicopter to reach, for example. Blackwater Draw, New Mexico A palaeontologist excavating a mammoth in Portales, New Mexico, circa 1960. Dick Kent/FPG/Archive Photos/Getty Images In 1929, 19-year-old James Ridgley Whiteman found mammoth bones along with fluted projectile points near Clovis, New Mexico. The Clovis people who made these tools were named for this site.Researchers studying the site began to realize the artifacts found at the site belonged to different cultures. Clovis points are typically larger than Folsom flutes, which were first found at another archaeological site in New Mexico.For decades after Whiteman's discovery, experts thought the Clovis people were the first to cross the Bering land bridge from Asia around 13,000 years ago. Estimates for humans' arrival is now thought to be at least 15,000 years ago.Eastern New Mexico University's Blackwater Draw Museum grants access to the archaeological site between April and October. Upper Sun River, Alaska Excavations at the Upward Sun River, Alaska. Ben Potter/University of Alaska, Fairbanks One reason the dates of human occupation in North America is so contentious is that very few ancient remains have been found. Among the oldest is a child from Upward Sun River, or Xaasaa Na', in Central Alaska.Archaeologists found the bones of the child in 2013. Local indigenous groups refer to her as Xach'itee'aanenh t'eede gay, or Sunrise Girl-Child. Genetic testing revealed the 11,300-year-old infant belonged to a previously unknown Native American population, the Ancient Beringians.Based on the child's genetic information, researchers learned that she was related to modern Native Americans but not directly. Their common ancestors started becoming genetically isolated 25,000 years ago before dividing into two groups after a few thousand years: the Ancient Berignians and the ancestors of modern Native Americans.According to this research, it's possible humans reached Alaska roughly 20,000 years ago. Poverty Point National Monument, Louisiana Poverty Point in Louisiana. National Park Service Stretching over 80 feet long and 5 feet tall, the rows of curved mounds of Poverty Point are a marvel when viewed from above. Over 3,000 years ago, hunter-gatherers constructed them out of tons of soil. Scientists aren't sure exactly why people built them, whether they were ceremonial or a display of status.The artifacts various groups left behind indicate the site was used off and on for hundreds of years and was a meeting point for trading. People brought tools and rocks from as far as 800 miles away. Remains of deer, fish, frogs, alligators, nuts, grapes, and other food have given archaeologists insights into their diets and daily lives.You can see the World Heritage Site for yourself year-round. Horseshoe Canyon, Utah The Great Gallery in Horseshoe Canyon. Neal Herbert/National Park Service Though remote, the multicolored walls of Horseshoe Canyon have long attracted visitors. Some of its artifacts date back to between 9,000 and 7,000 BCE, but its pictographs are more recent. Some tests date certain sections to around 2,000 to 900 years ago.The four galleries contain life-sized images of anthropomorphic figures and animals in what's known as the Barrier Canyon style. Much of this art is found in Utah, produced by the Desert Archaic culture.The pictographs may have spiritual and practical significance but also help capture a time when groups were meeting and mixing, according to the Natural History Museum of Utah.It's a difficult trek to get to the pictographs (and the NPS warns it can be dangerously hot in summer) but are amazing to view in person, Feder said. "These are creative geniuses," he said of the artists. Canyon de Chelly, Arizona The Antelope House at Canyon de Chelly National Monument. Michael Denson/National Park Service Situated in the Navajo Nation, Canyon de Chelly has gorgeous desert views and thousands of years of human history. Centuries ago, Ancestral Pueblo and Hopi groups planted crops, created pictographs, and built cliff dwellings.Over 900 years ago, Puebloan people constructed the White House, named for the hue of its clay. Its upper floors sit on a sandstone cliff, with a sheer drop outside the windows.Navajo people, also known as Diné, still live in Canyon de Chelly. Diné journalist Alastair Lee Bitsóí recently wrote about visiting some of the sacred and taboo areas. They include Tsé Yaa Kin, where archaeologists found human remains.In the 1860s, the US government forced 8,000 Navajo to relocate to Fort Sumner in New Mexico. The deadly journey is known as the "Long Walk." Eventually, they were able to return, though their homes and crops were destroyed.A hike to the White House is the only one open to the public without a Navajo guide or NPS ranger. Mesa Verde National Park, Colorado Visitors line up at Mesa Verde National Park. Shutterstock/Don Mammoser In the early 1900s, two women formed the Colorado Cliff Dwelling Association, hoping to preserve the ruins in the state's southwestern region. A few years later, President Theodore Roosevelt signed a bill designating Mesa Verde as the first national park meant to "preserve the works of man."Mesa Verde National Park holds hundreds of dwellings, including the sprawling Cliff Palace. It has over 100 rooms and nearly two dozen kivas, or ceremonial spaces.Using dendrochronology, or tree-ring dating, archaeologists learned when Ancestral Pueblo people built some of these structures and that they migrated out of the area by the 1300s.Feder said it's his favorite archaeological site he's visited. "You don't want to leave because you can't believe it's real," he said.Tourists can view many of these dwellings from the road, but some are also accessible after a bit of a hike. Some require extra tickets and can get crowded, Feder said. Cahokia, Illinois A mound at Cahokia in Illinois. Matt Gush/Shutterstock Cahokia has been called one of North America's first cities. Not far from present-day St. Louis, an estimated 10,000 to 20,000 people lived in dense settlements roughly 1,000 years ago. Important buildings sat atop large mounds, which the Mississippians built by hand, The Guardian reported.At the time, it was thriving with hunters, farmers, and artisans. "It's an agricultural civilization," Feder said. "It's a place where raw materials from a thousand miles away are coming in." Researchers have also found mass graves, potentially from human sacrifices.The inhabitants built circles of posts, which one archaeologist later referred to as "woodhenges," as a kind of calendar. At the solstices, the sun would rise or set aligned with different mounds.After a few hundred years, Cahokia's population declined and disappeared by 1350. Its largest mound remains, and some aspects have been reconstructed.While Cahokia is typically open to the public, parts are currently closed for renovations. Montezuma Castle, Arizona Montezuma Castle, a cliff dwelling, in Arizona. MyLoupe/Universal Images Group via Getty Images Perched on a limestone cliff in Camp Verde, Arizona, this site is an apartment, not a castle, and is unrelated to the Aztec ruler Montezuma.The Sinagua people engineered the five-story, 20-room building around 1100. It curves to follow the natural line of the cliff, which would have been more difficult than simply making a straight building, Feder said."These people were architects," he said. "They had a sense of beauty."The inhabitants were also practical, figuring out irrigation systems and construction techniques, like thick walls and shady spots, to help them survive the hot, dry climate.Feder said the dwelling is fairly accessible, with a short walk along a trail to view it, though visitors can't go inside the building itself.

This German Town Carefully Reconstructed a 5,500-Year-Old Megalithic Monument After years of excavation and study, archaeologists have restored the Küsterberg burial site to its original layout to celebrate the annual European Day of Megalithic Culture Volunteers and archaeologists rebuilt the tomb site, lifting massive stones with modern excavation tools. Saxony-Anhalt State Office for Monument Preservation and Archaeology / Barbara Fritsch The Haldensleben forest in the German state of Saxony-Anhalt is home to more than 80 megalithic tombs from the Neolithic period—the largest concentration of such structures in central Europe. While some remain in fair condition, others have fallen victim to hazards ranging from ancient invasions to modern development. But instead of awaiting further decay, the town of Haldensleben has rebuilt a prominent 5,500-year-old tomb site known as Küsterberg to celebrate the European Day of Megalithic Culture, an annual holiday on the last Sunday of April. Archaeologists first excavated Küsterberg, located in a field southeast of Haldensleben, between 2010 and 2013, according to a statement from the Saxony-Anhalt State Office for Monument Preservation and Archaeology. Based on their findings, they were able to create a detailed plan of the site’s original layout. The semicircular site includes layers of rings around a central burial chamber, which is oriented from east to west. Saxony-Anhalt State Office for Monument Preservation and Archaeology / Anja Lochner-Rechta With the help of modern surveying equipment, excavators and a group of volunteers, archaeologists moved the massive granite megaliths stone by stone. In late April, the team unveiled the site, which has been transformed into an approximation of its original Neolithic layout. Like many Neolithic burial sites, Küsterberg is oriented from east to west. Some scholars speculate that this practice was meant to link the path of the sun to the course of a human life, according to Artnet’s Richard Whiddington. With an opening on the southern side, the semi-circular interior burial chamber once measured nearly 40 feet long and about 6.5 feet wide. It featured 19 orthostats—upright stone slabs—with seven capstones on top. Neolithic masons filled the gaps between individual stones with shards of greywacke, a type of sandstone that also lined the chamber floor. The reconstruction was based on years of measurements and careful study of the site's original layout. Saxony-Anhalt State Office for Monument Preservation and Archaeology / Barbara Fritsch The burial chamber was surrounded by 16 megaliths spaced about 6.5 feet apart. These gaps were also filled with greywacke. The complex was ringed by an earthen mound, which archaeologists suspect was built with dirt taken from a nearby hill. The reason for the abundance of burial sites in the region is the dense population that once lived in the forests, as Johannes Müller, an archaeologist at the University of Kiel, tells the German TV station MDR-Fernsehen. He adds that scholars have identified ten settlements nearby, and every family may have built their own gravesite. Barbara Fritsch, an archaeologist with the State Office for Monument Preservation and Archaeology, tells MDR-Fernsehen that the site was built around 3600 B.C.E., when migrants from northwestern Europe settled in the area. An aerial view of the reconstructed Küsterberg site Saxony-Anhalt State Office for Monument Preservation and Archaeology / Barbara Fritsch However, some 3,000 years ago—around the transition from the Bronze Age to the Iron Age—newcomers to the area disturbed the burial site by removing parts of the mound and displacing stones. Much later, agriculture and road construction caused additional damage to sites like Küsterberg throughout central Europe. Last year, archaeologists uncovered a Neolithic burial landscape, including burial mounds and cattle sacrifices, as they excavated the site of a proposed Intel semiconductor fabrication plant in Magdeburg, Germany, per Artnet. Now reconstructed and preserved, the Küsterberg site will join Megalithic Routes, a network of European archaeological sites from the Neolithic period, per a statement from the University of Kiel. Researchers hope it will “inspire visitors with enthusiasm for the region and its long history.” Get the latest stories in your inbox every weekday.

Researchers reviewed ocean floor samples collected during the Deep Sea Drilling Project in 1975. Credit: Deposit Photos / Oleg Dorokhin Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. There was a time long ago when the Atlantic Ocean didn’t exist. The general understanding among geologists is that the body of water originated between 83 to 113 million years ago, when South America and Africa split into their two respective continents to form the Equatorial Atlantic Gateway. However, Earth’s marine history appears to require a multimillion-year revision thanks to a recent discovery roughly half a mile beneath the ocean floor. The evidence is explored in a study published in the June edition of the journal Global and Planetary Change. According to geologists at the UK’s Heriot Watt University, gigantic waves of mud and sand sediment about 250 miles off the coast of Guinea-Bissau in West Africa indicate the Atlantic Ocean actually formed around four million years earlier than previous estimates. To understand just how intense all of this movement was, imagine waves that are about half a mile long and over 300 feet high.  “A whole field formed in one particular location to the west of the Guinea Plateau, just at the final ‘pinch-point’ of the separating continents of South America and Africa,” study co-author Uisdean Nicholson explained in a statement. Nicholson and their colleagues initially came across these layers of mud waves after comparing seismic data with core samples collected from wells during the Deep Sea Drilling Project (DSDP) of 1975. Five layers in particular were utilized to recreate the tectonic processes that broke apart the ancient supercontinent of Gondwana during the Mesozoic Era. “One layer was particularly striking: it included vast fields of sediment waves and ‘contourite drifts’—mud mounds that form under strong bottom currents,” said Nicholson. These waves initially formed as dense, salty water poured out from the newly created Equatorial Atlantic Gateway, “like a giant waterfall that formed below the ocean surface,” he added. Just before the geologic event, huge salt deposits formed at the bottom of what is now the South Atlantic. After the gateway opened, the underground mudfall occurred when dense, relatively fresh Central Atlantic water in the north combined with very salty waters in the south. The resulting sedimentary evidence examined by the study’s authors now indicates this opening seems to have started closer to 117 million years ago. “This was a really important time in Earth’s history when the climate went through some major changes,” explained study co-author Débora Duarte. “Up until 117 million years ago, the Earth had been cooling for some time, with huge amounts of carbon being stored in the emerging basins, likely lakes, of the Equatorial Atlantic. But then the climate warmed significantly from 117 to 110 million years ago.” Duarte and Nicholson believe part of that major climatic change  helped from the Atlantic Ocean, as seawater inundated the newly formed basins. “As the gateway gradually opened, this initially reduced the efficiency of carbon burial, which would have had an important warming effect,” said Duarte. “And eventually, a full Atlantic circulation system emerged as the gateway grew deeper and wider, and the climate began a period of long-term cooling during the Late Cretaceous period.” The ramifications go beyond revising Earth’s geological timeline or the gateway’s role in Mesozoic climate change. Better understanding the influence of oceanic evolutionary journeys on ancient climate patterns can help to predict what the future holds for the planet.  “Today’s ocean currents play a key role in regulating global temperatures,” explained Nicholson. “Disruptions, such as those caused by melting ice caps, could have profound consequences.”