Quote:
Originally Posted by jjjnettie
We won't need a GRB to wipe out life on Earth, we're doing the job quite nicely ourselves.
|
There is evidence that life arose on Earth some 4 GY ago, fairly early in the Earth's history. There is no evidence that I can see of life being wiped out in any collective sense either now or in the future.
Seems to be doing rather nicely, actually.
We often forget that the overwhelming bulk of life on Earth, both in numbers and organic bulk, is unicellular. It has to represent 99.99% of life on Earth. Always has been and probably always will be. Those bacteriums know a thing or two about survival. Us macro beings just come and go in mere flickers of time.
It is not only astronomy that makes us humble to how insignificant we are, biology does the same.