New research, however, suggests Earth already had enough hydrogen of its own, thank you very much.
The composition of enstatite chondrite meteorites closely resembles that of Earth 4.55 billion years ago.
A fundamental question for planetary scientists is how Earth came to look like it does today.
A sample of meteorite LAR 12252.© NASA
As a result, they used an intense beam of X-rays to search the meteorite for sulfur compounds.
This implies that the hydrogen sulfide in the matrix is most likely intrinsic.
Water is essential to all known living creatures.
Pieces of LAR 12252. © NASA
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