80 000 years of Eve

Stephen Fry: "Geneticists have established that every woman in the world shares a single female ancestor, who lived 150,000 years ago. Scientists do actually call her Eve. And every man shares a single male ancestor, dubbed Adam. It has also been established, however, that Adam was born 80,000 years after Eve. So the world before him was one of heavy to industrial strength lesbianism, one assumes."