Women's, not so much. A couple of evolutionary biologists think they've identified the origins of the female orgasm, which has puzzled great minds for millennia. Newsletters Games Share a News Tip.

Any organism is a by-product of both its genetic makeup and the environment. To understand this in detail, we must first appreciate some basic genetic vocabulary and concepts. Here, we provide ...

Not only do we descend, along with all other life on Earth, from a single celled organism that lived 4 billion years ago, humans are, on average, 99.5% genetically similar to each other.