This is today's edition ofThe Download,our weekday newsletter that provides a daily dose of what's going on in the world of technology. The second wave of AI coding is here Ask people building generative AI what generative AI is good for right nowwhat theyre really fired up aboutand many will tell you: coding. Everyone from established AI giants to buzzy startups is promising to take coding assistants to the next level. Instead of providing developers with a kind of supercharged autocomplete, this next generation can prototype, test, and debug code for you. The upshot is that developers could essentially turn into managers, who may spend more time reviewing and correcting code written by a model than writing it from scratch themselves.But theres more. Many of the people building generative coding assistants think that they could be a fast track to artificial general intelligence, the hypothetical superhuman technology that a number of top firms claim to have in their sights.Read the full story.Will Douglas Heaven OpenAI has created an AI model for longevity science When you think of AIs contributions to science, you probably think of AlphaFold, the Google DeepMind protein-folding program that earned its creator a Nobel Prize last year. Now OpenAI says its getting into the science game toowith a model for engineering proteins. The company says it has developed a language model that dreams up proteins capable of turning regular cells into stem cellsand that it has handily beat humans at the task. The work represents OpenAIs first model focused on biological data and its first public claim that its models can deliver unexpected scientific results. But until outside scientists get their hands on it, we cant say just how impressive it really is. Read the full story. Antonio Regalado Cleaner jet fuel: 10 Breakthrough Technologies 2025 New fuels made from used cooking oil, industrial waste, or even gases in the air could help power planes without fossil fuels. Depending on the source, they can reduce emissions by half or nearly eliminate them. And they can generally be used in existing planes, which could enable quick climate progress. These alternative jet fuels have been in development for years, but now theyre becoming a big business, with factories springing up to produce them and new government mandates requiring their use. So while only about 0.5% of the roughly 100 billion gallons of jet fuel consumed by planes last year was something other than fossil fuel, that could soon change. Read the full story.Casey Crownhart Cleaner jet fuel is one of our 10 Breakthrough Technologies for 2025, MIT Technology Reviews annual list of tech to watch. Check out the rest of the list, and cast your vote for the honorary 11th breakthrough. The must-reads Ive combed the internet to find you todays most fun/important/scary/fascinating stories about technology. 1 TikTok is back online in the US The company thanked Donald Trump for vowing to fight the federal ban its facing. (The Verge)+ The app went dark for users in America for around 14 hours. (WP $)+ AI search startup Perplexity has suggested merging with TikTok. (CNBC)+ Heres how people actually make money on TikTok. (WSJ $)2 Trumps staff has an Elon Musk problem Aides are annoyed by his constant contributions to matters he has little knowledge of. (WSJ $)+ A power struggle between the two men is inevitable. (Slate $)+ The great and the good of crypto attended a VIP Trump party on Friday. (NY Mag $)3 AI is speeding up the Pentagons kill list Although the US military cant use the tech to directly kill humans, AI is making it faster and easier to plan how to do just that. (TechCrunch)+ OpenAIs new defense contract completes its military pivot. (MIT Technology Review)4 The majority of Americans havent had their latest covid booster Though they could help to protect youand others. (Undark)+ Its five years today since the US registered its first covid case. (USA Today)5 Europol is cracking down on encryption The agency plans to pressure Big Tech to give police access to encrypted messages. (FT $)6 This Swiss startup has created a powerful robotic wormBorobotics wants to deploy the bots to dig for geo-thermal heat in our gardens. (The Next Web) 7 Thousands of lithium batteries were destroyed in a massive fireThe worlds largest battery storage plant went up in flames in California. (New Scientist $) + Three takeaways about the current state of batteries. (MIT Technology Review)8 Amazons delivery drones struggle in the rain Bloomberg $) 9 A Ring doorbell captured a meteorite crashing to Earth Its the first known example of a meteorite fall documented by a doorbell cam. (CBS News)10 AI is coming for your wardrobe A wave of new apps will suggest what to wear and what to pair it with. (The Guardian)Quote of the day "TikTok was 100x better than anything you've created. An Instagram user snaps at Facebook founder Mark Zuckerberg in the wake of TikToks temporary US blackout over the weekend. The big story Running Tide is facing scientist departures and growing concerns over seaweed sinking for carbon removal June 2022 Running Tide, an aquaculture company based in Portland, Maine, hopes to set tens of thousands of tiny floating kelp farms adrift in the North Atlantic. The idea is that the fast-growing macroalgae will eventually sink to the ocean floor, storing away thousands of tons of carbon dioxide in the process. The company has raised millions in venture funding and gained widespread media attention. But it struggled to grow kelp along rope lines in the open ocean during initial attempts last year and has lost a string of scientists in recent months, sources with knowledge of the matter tell MIT Technology Review. What happens next? Read the full story. James Temple We can still have nice things A place for comfort, fun and distraction to brighten up your day. (Got any ideas? Drop me a line or skeet 'em at me.) + Why not cheer up your Monday with the kings of merriment, The Smiths?+ This is fascinating: how fish detect color and why its so different to us humans.+ The people of Finland know a thing or two about happiness.+ Its time to get planning a spring getaway, and these destinations look just fabulous.