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 ...

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 ...

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 ...