Reply #4: I've learned [View All]

[wtbymark]

(who knows where) that there were 3 extinction events since the formation of the Earth. With the gene pool that exists now, scientists have calculated that each event destroyed 95% of the existing gene pool. So, the first took 95% out of 100%, the second took 95% of 5%, and the third (the dinosaur extinction event) took 95% of .25% of the original gene pool, what's left? = .2375% of the original gene pool.

on edit: typo