Nothing on Earth can live without water. The origin of water on Earth, therefore, is the origin of life in the Solar System (and the Universe) as we know it.
, that giant smash-up 4.5 billion years ago actually depleted Earth and the Moon of their volatiles.
The latter especially is thought to be a good proxy for understanding the long-term volatile budget of the Moon, and relative abundances of moderately volatile elements, such as rubidium, reflect the behavior of more volatile species, like water.Sr in the Earth-Moon system, even prior to the giant impact. This suggests that both proto-Earth and the impactor, Theia, were strongly depleted in volatile elements, suggesting that volatile depletion was not a result of the giant impact after all.
France Dernières Nouvelles, France Actualités
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