NEW: Earth is drenched in life-giving water. But scientists don't actually know where it all came from. Comets? Asteroids?
Now, some (crazy) new experiments offer a tantalising possibility: Earth might have made its own oceans!
Me @quantamagazine.bsky.social www.quantamagazine.org/where-did-ea...
At first, scientists thought Earth’s water came from comets. Then, asteroids. Now, they wonder if Earth’s water is homegrown.
