Questions tagged [carbon-cycle]

Use for questions on the chemial transformations of carbon-containing compounds on a planet. Consider using "astrobiology".

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Would gravitational stratification deter carbon-based life on large rocky planets?

Most of Earth's heavy elements are concentrated in its deepest layers, as they're denser than the surrounding silicates and sink to the core. If its overall gravitational pull were substantially ...
Thoth's user avatar
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14 votes
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Why is carbon so rare on the Moon and on Mars?

Carbon is the fourth most common element in the universe and in the Solar system. It is about the ninth most common element in Earth's crust. It doesn't seem to be part of any of the ten most common ...
LocalFluff's user avatar
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Is early life required for life?

I was watching the new Cosmos and Neil DeGrasse Tyson said something that made me go hmmm... He mentioned that the only reason that the Earth did not experience the runaway greenhouse effect like ...
Scottie's user avatar
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