> "Proving amino acids exist in the subsurface of asteroids increases the likelihood that the compounds arrived on Earth from space," he said.
Are we sure it doesn't just mean the compounds were already sitting on Earth for the same reason they're sitting on the asteroid? I guess maybe if literally all of them were cooked to death in the Hadean and had to be refreshed from space, but then how do they avoid being cooked to death in asteroid impacts?
I belief the latest theories state thet life started already before the end of the Hadean. From that I conclude that cooking to death occurs less than one might think. 4.1B years ago while the hadean ended 4B years.
I think I was just using "Hadean" incorrectly to refer to "when the Earth was still basically molten". Thinking/reading about it some more I'm not sure that was ever enough of a thing to actually cook off organic molecules (but if it was, yeah it definitely ended early enough for life to start really dang early).
Are we sure it doesn't just mean the compounds were already sitting on Earth for the same reason they're sitting on the asteroid? I guess maybe if literally all of them were cooked to death in the Hadean and had to be refreshed from space, but then how do they avoid being cooked to death in asteroid impacts?