Top 5

Spain's supreme court issued a 'reasonable' immigration ruling on July 8. By month's end, 57 people were dead, many by drowning. The causal chain is precise, horrifying, and instructive.

Ten math problems, open for decades across eight fields, fell in one release — at ~$2,000 in compute. Each proof is machine-verified in Lean, so you don't have to trust the AI. You can check.

For the first time, astronomers have detected a moon orbiting a planet outside our solar system. The signal came from a wobble within a wobble — a planet's tug hiding a smaller companion's pull.

You ride them daily without thinking. This piece peels open the engineering, economics, and urban design hiding inside the elevator shaft — and 1,500+ HN commenters couldn't stop talking about it.

Your genome carries traces of hominin species that left no fossils. A new technique just identified them — ancestors so old their bones are gone, but their genes survive in you.