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patricksaurus t1_j1akmsm wrote

Reply to comment by SvenTropics in Mars' ancient atmosphere may not have had much oxygen after all by pecika

Oxygen is the most abundant element in Earth’s crust. It’s the third most abundant element in the universe. The null hypothesis of abiotic iron oxides has to be rejected before you speculate about life on Mars based on iron oxide mineralogy.

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EmperorHans t1_j1c5kdv wrote

Man, I had a wildly misinformed idea of what's in earths crust. I just looked up the top ten, and that list looks nothing like I wouldve guessed.

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patricksaurus t1_j1c8u4n wrote

Oh this is an interesting comment for me. Do you mind telling me what you expected? Not strictly as a list, just sorta what you thought and maybe why? I’m always curious about this kind of thing.

For instance, I expected a more hydrogen, just because of its abundance in the universe.

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SvenTropics t1_j1anb94 wrote

"Molecules containing Oxygen". O2 is wildly reactive. It doesn't stick around long.

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