Asymmetric Religion and Philosophy

Catholics are free to believe in evolution and a billions year-old Earth provided that they believe, among other things (here), that there was an actual Adam and Eve.

This interesting article says that evidence does indeed exist for a "mitochondrial Eve:"

Studies using mitochondrial DNA, which is passed down through mothers, have traced modern humans to a single "mitochondrial Eve," who lived in Africa about 200,000 years ago.

From the looks of Eve, this wasn't her first apple.