
Originally Posted by
natacha
Would you agree that some species extinction is due to a natural selection?
Yes, extinction is a fundamental & unavoidable process of evolution, natural selection is one of the main mechanisms by which evolution operates (the other being genetic drift). No species survives forever, they all eventually go extinct. 90% or more of all the species that have ever lived on this planet are now extinct. I can't see any reason why human beings would be any different. We'll probably fight our own extinction like no other living organism ever has but chances are homo sapiens will eventually go extinct.
Most species go extinct because of competition from a superior organism or changes too their ecosystem (or a combination of both). Given that humans are the top predator on planet earth I think it's likely that we'll play a very big part in our own demise. That could come from a microscopic organism of our own creation that wipes us out or changes we make to our own ecosystem. Either through pollution, overpopulation etc or more sudden & drastic changes like nuclear holocaust. Or a combination of some or all of the these examples.
However we eventually manage to do it our own extinction would make a fascinating case study. Shame we won't be around to learn from our mistakes :(
I just saw my parents having sex, that's the last time I visit that website.