/sci/ - Science & Math

[Anonymous No.10375093]

Why hasn't complex life on earth arisen multiple times?

[Anonymous No.10375201]

>Why hasn't complex life on earth arisen multiple times?
What makes you think it hasn't?

[Anonymous No.10375218]

>>10375093
Because white racists humans kill it and ruin everything

[Anonymous No.10375225]

>>10375201
this
but also, given earths climate etc, specific chemicals and also chem reactions are more likely to occur. so if life did get re created, it would likely be very similar etc. BUT also , the formation of life is very complex,would have to of required some certain environment factors that might not exist today, one hypothesis my bio 182 teacher said it occurred during a time of high amounts of volcano activity / A CRAZY bunch of lightning, which might have helped life gets its first start?

[Anonymous No.10375243]

>>10375225
the lack of artifacts in the geologic record

[Anonymous No.10376060]

>>10375093
1: This: >>10375201
2: The niches are full. Any new lifeforms would have to be different enough that they weren't competing against established lifeforms for a niche.

[Anonymous No.10376467]

Did microbes that evolved to depend on energy from hydrothermal vents develop independently?

[Anonymous No.10377065]

>>10375243
Artifacts made from organic matter would have disappeared by now.

[Anonymous No.10377190]

Define "complex". Because multicellularity has arisen independently in something like ten or twenty groups. There's metazoans (and parazoans like vendobionts and sponges) and viridiplantae and rhodophytes and glaucophytes and fungi and a few other weird groups scattered across the eukaryotic tree.

>>10376060
this basically.