Scientists Find Evidence of Flowing Water on Giant Asteroid
Today, the near-Earth asteroid known as Ryugu is bone dry. But new research suggests that the half-mile space rock may have once been flowing with liquid water — and crucially, at a period in the solar system's history far later than when that would have been thought possible. The findings, published in a new study in the journal Nature, could add weight to the theory that soggy asteroids brought Earth its first stores of H2O billions of years ago. "This changes how we think about the long-ter