I watched a program on the science channel a while back and it was talking about a university that did a study of mitochondrial dna which is outside of the nucleus. Mitochondrial dna is inherited from your mom and passed down threw the females. It mutates at a regular rate which you can use to calculate certain things about the population. Anyway, they found that out of everyone they studied their mitochondrial dna was suprisingly similar.

They did some calculations and concluded around 70,000 years ago, the humans were nearly killed out and left only a few thousand alive. From these few came billions of humans meaning that genetic variations are less because of near extinction. They call it a population bottle neck big to small to big again.
They also went on connecting that time period to a super volcano that happend around that time. Well, evolution takes amillions of years and I dont think that we will notice any change in the species for quite some time.
420ultimatesmokage Reviewed by 420ultimatesmokage on . Thinking About Human Evolution Fundamentalists, this is not the thread for you. I've been thinking lately about human evolution. Evolution is a process that affects all species, and there is no reason to believe it has stopped working in mankind. In fact, it is well known that species which have to suddenly adapt to a new environment evolve more rapidly than others. Now, in the past 10,000 years, just 1% of the time in which modern Homo sapiens has existed, we've witnessed the creation and flourishing of civilization, by Rating: 5