Known non-biological sources, from meteorites to surface chemistry, fall short of accounting for organic compounds detected by NASA’s Curiosity rover, according to a new study published in the journal Astrobiology.
IIRC we don’t know when life started on earth because records of the early earth aren’t available - geological activity recycled the surface. What evidence we do have is that life started pretty much as early as the records we have can show, meaning either it appeared very quickly once the planet cooled or was already present.
IIRC we don’t know when life started on earth because records of the early earth aren’t available - geological activity recycled the surface. What evidence we do have is that life started pretty much as early as the records we have can show, meaning either it appeared very quickly once the planet cooled or was already present.