[Right Wing Professor]

Well ok then.... The pretty much kills the "8 pairs are required for any species to survive" theory doesn't it?

Nope.

The mitochondria of every human alive today derive from a single woman who lived approximately 100,000 years ago. She wasn't the only human alive at the time.

[darbymcgill]

The mitochondria of every human alive today derive from a single woman who lived approximately 100,000 years ago.

Ok, thanks... I'll try to be more precise this time...

Actually, the folks studying species extinction say that about 8 pairs are required for any species to survive.

Emphasis added by me...

That pretty much kills the "all living things come from a single common ancestor" theory doesn't it?