Evolutionary theory has come up with nice explanations to many phenomena. But there are also a few exceptions. Female breasts are one. No female animals have enlarged breasts when they don't breastfeed. No animals except humans. There are a number of explanations to this, to be found on for example
0 subscriptions will be displayed on your profile (edit)
Skip for now
For your security, we need to re-authenticate you.
Click the link we sent to , or click here to sign in.