University of California research finds that natural selection deleted weak 'caveman DNA'

Why Neanderthal DNA lost out: Natural selection deleted weak'caveman DNA' from our genome The Neanderthals became extinct about 30,000 years ago - but not before interbreeding with their close human relatives, Homo sapiens. The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline. By posting your comment you agree to our house rules.