This month marks the twenty-fifth anniversary of the discovery of Mitochondrial Eve, the common ancestor of every human alive today. Here's everything you need to know about why the mother of humanity is so important.
Inbreeding is where cousins and other close relatives have children together. Most cultures have strong taboos against it, primarily because of the increased risk of birth defects. Here's why that risk isn't all it's cracked up to be.
All humans can trace their family tree back to a surprisingly small group of common ancestors. Every person on Earth's most recent common ancestor might have died less than 2000 years ago.