4 votes
Accepted

Why are ice giants not considered suitable for life?

A basic approach would be to estimate the air-pressure at the top of the mantle. Uranus' surface gravity is a bit less than Earths, but, somewhat counter-intuitively, it's atmosphere is light enough ...
userLTK's user avatar
  • 24k
1 vote

What possible effects of life replicating on gas giant atmosphere?

Yes, but probably not by a huge amount. There are two obvious ways this could happen: Direct change in atmospheric composition. If our microbe does something like eat methane and excrete longer-chain ...
Trip Space-Parasite's user avatar
1 vote

Is early life required for life?

Maybe he was thinking about the Great Oxidation Event? It was produced by early life forms (such as cyanobacteria) and, even if it caused an extinction at the time, it is thought that it allowed ...
Jean-Marie Prival's user avatar

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