Neanderthals couldn’t stop sleeping with their family members – and it may have spelled their demise 40,000 years ago. Rampant inbreeding left many of the ancient human-like creatures with physical ...

Two days ago, the last male northern white rhino (Ceratotherium simum cottoni) died. His passing leaves two surviving members of his subspecies: both females who are unable to bear calves. Even though ...

Today, Homo sapiens are the only humans left on Earth. But thousands of years ago there were more of us — other species that belonged to the same genus, and in turn, our family tree. They are now ...

We all understand the concept of inbreeding in human terms – where people who are too genetically similar reproduce, resulting in offspring with deformities. With each inbred generation, the gene pool ...