Image Credit: Mike Baird, CC BY 2.0; Chuck Szmurlo, CC BY 3.0; Ryan Hagerty, USFWS, Public Domain)
Nowadays we know to avoid mating with close relatives so that your children are healthy. As close relatives accumulate similar genetic diversity, mating between relatives of most species can lead to genetic diseases in their offspring. Humans have a lot of options; there are 7 billion of us worldwide. But how about an endangered species with less than 10 individuals in the wild?