A few thousand survivors

This article has an interesting statement:

Some scientists, supported by DNA evidence, think an environmental catastrophe resulted and influenced the course of human history, with the few thousand survivors becoming the ancestors of all almost people alive today.

I guess instead of this grand diversity promised by evolution there is a remarkably few "ancestors" for all modern humans. Earlier in the article, they said this blast happened about 75,000 years ago. In evolutionary time, this is a very, very short time ago, and with regard to creation it's less than an order of magnitude from the 10,000 years figure. Perhaps I just see what I want to see, but this sure seems to reek of a common ancestor such as the Biblical account of creation and flood would demand; perhaps even Noah and his family???