[ExI] Some thoughts on the Fermi Paradox

[John Clark]

On Mon, Jan 26, 2026 at 4:14 PM Jason Resch via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

*> I've seen estimates that life could have started a billion years earlier
> than it did on earth (and possibly earlier). *


*The Earth formed 4.54 billion years ago and life existed 4.1 billion years
ago, and incredibly there is some evidence it may have existed 4.48 billion
years ago. The emergence of liquid water existing on the surface and the
emergence of life seems to have occurred almost simultaneously. Since we
have only one example to work with we don't know if that is freakishly
early or is normal, but we do know that life couldn't have started much
earlier.   *

*> The limiting factor being the metallicity of stars (which requires
> several generations of stars to have lived and gone supernova). I think
> also the speed of evolution is variable and depends on things like the
> amount of habitat, abundance of resources, etc. A lot of it may also be
> purely random luck.*


*I agree with all of that. *

*John K Clark *
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