Top 5

Forget comets. Forget asteroids. New evidence suggests Earth's water was hiding inside iron minerals all along — and the planet basically sweated out its own oceans during formation.

Millions of people scanning real-world locations to catch Pikachu were unknowingly building the navigation system for military drones. 705 HN points and counting.

The largest IPO in history happened today. SpaceX is now one of the biggest public companies on Earth, and the shares are already climbing.

There's a secret language born in Soviet gulags that modern hackers now use to evade detection. It's called fenya, and its history is wild.

What happens when a country's land disappears underwater? Tuvalu is rewriting international law so its sovereignty survives even if its islands don't.