The Post Most: They built the world’s most powerful AI. They’re facing a mystery they can’t explain.

Plus: Takeaways from the Colorado primaries

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July 4th sale: Read for $20Billed as $20 for the first year, then $140/year. Pricing subject to change. Cancel anytime. → PUBLISHED BY READ ONLINE | SIGN UP   They built the world’s most powerful AI. They’re facing a mystery they can’t explain.  (Tilde Oyster/The Washington Post; iStock) Anthropic, Google and Meta have hired computer scientists, neuroscientists and philosophers to study what some in the industry think may become a moral crisis. By Nitasha Tiku Read more   Voters are angry with Washington, and other takeaways from the Colorado primaries   ICE’s arrest of nun heading to church fuels bipartisan backlash in South Texas   Review Tim Carman, Warren Rojas and Jade Tran Every food stall is a mystery at the Great American State Fair   Opinion  Salena Zito A 264-year-old George Washington mystery solved   Column  Gretchen Reynolds There’s a new way to treat sprains and strains. Hint: Ice is out.   See which 7 cities could soon see record-hot days and nights   Rulings on women’s sports cap a year of setbacks for transgender advocates   Trump’s focus on his construction projects has increased, Post analysis finds   What will the world look like 50 years from now?   ADVERTISEMENT   If you’re at risk of Alzheimer’s, these dietary habits can help, study finds   GOP rebellion over Trump’s elections overhaul leads House to recess for July Fourth early   5 takeaways from Supreme Court rulings this term   Trump’s income topped $2 billion in 2025, boosted by crypto, coin ventures   Pope Leo plans to send a message about migrants on July Fourth   ADVERTISEMENT   These kids would have to pay $400 to run a lemonade stand. So they fought back.   Opinion  Erin Antler I love my husband, but my marriage is costing me   Influencer chooses followers over being a friend to me. Hax readers give advice.   TAKE A GAME BREAK News quiz: Test your knowledge in today’s On the Record. Word game: One word to spell ’em all! Can you solve today’s Keyword in 6 guesses? Crossword: It’s time to solve! Play now. Wridges: Speed and spell your way up to a high score in our newest game.   At the World Cup Meet the barista who keeps the U.S. World Cup team grounded  (Becky Reeves) You try playing 90 minutes of top-level soccer without caffeine. But Becky Reeves's coffee cart offers more than just a kick of energy. By Rick Maese Read more   ‘Who cares if we lose? I’ve found ranch dressing.’   As teens, they saw a U.S. World Cup dream fail. As men, they’re reviving it.   YOU MIGHT ALSO LIKE By The Way Travel better with news, tips and guides that make you feel like a local wherever you go. Sign up ➝     You received this email because you signed up for this newsletter or because it is included in your subscription. Manage newsletters | Unsubscribe 1301 K St NW, Washington DC 20071 DOWNLOAD OUR APP      ©2026 The Washington Post | Privacy Policy | Help & Contact