RE: Panspermia theory?
May 23, 2017 at 12:15 am
(This post was last modified: May 23, 2017 at 12:19 am by Anomalocaris.)
(May 22, 2017 at 10:11 pm)ignoramus Wrote: I'm still fascinated by the notion that life can only evolve by only one possible genetic framework.
IE, do you guys believe that other life on other planets could have a completely incompatible tree of life to ours?
If so, if panspermia happened concurrently with our own independent evolution, why then, is there only one tree of life?
Did our conditions favour only one? Shouldn't it be the home grown advantage, logically speaking?
Who came up with that notion?
Why do you think panspermia means life arrived here from elsewhere? Perhaps panspermia means life that arose here went Elsewhere?
We don't really have a good explanation for the appearent genetic affinity shared by all known life on earth. Maybe abiogenesis on earth is a rather unlikely event, and we are lucky it happened once, and it is too much to expect for it to have happened successfully here twice? Hence all life on earth shared the same origin?
Maybe abiogenesis didn't happen here, and panspermia is also unlikely, but although unlikely it did happen once, but hasn't yet happened again, hence all life on earth share the same origin and are therefore generically related?
Maybe there is Subtle but as yet unknown biochemical reasons why there is only a very narrow range conditions that can give rise to abiogenesis, so although abiogenesis happened many times here, and perhaps also elsewhere and came here through abiogenesis, all life must nonetheless be necessarily so alike biochemically they appear to be related?
If you watch any sci fi movies it would appear the last option is implied by Hollywood to be so.
