Re:Observable Universe contains 10x more galaxies than previ...
by padobson on Thursday January 04, 2018 @12:53PM
(#16072360)
> It's possible life evolved many times on earth
It's also possible it evolved elsewhere and rode here on a meteor - or was brought here by some other lifeform several orders of magnitude more advanced than us, using earth as their own cosmic terrarium.
Re:Observable Universe contains 10x more galaxies than previ...
by Retric on Thursday January 04, 2018 @03:27PM
(#16073753)
Why not both. We could also be descendants of an invasive alien species that killed off all of Earth's native lifeforms.
It's good practice to assume the simplest possible solution. However, the full range of the full range of what might have happened is ridiculously large.
That's not nessisarily true. Single celled organisms have a rather fluid exchange of genetic information even our 'single cells' are really several different organisms. It's possible life evolved many times on earth and current single celled organisms and thus all life has a mismatch of ancestors.
Further, life may regularly evolve even today, but simply get eaten due to the stiff competition.
PS: We know life evolved at least once, but the high end could be multiple times a second on earth.