Could social bonds be the key to human big brains? A study of the fossil teeth of early Homo from Georgia dating back 1.77 million years reveals a prolonged childhood despite a small brain and an ...

Microorganisms—bacteria, viruses and other tiny life forms—may drive biological variation in visible life as much, if not ...

Gene mutations have consequences both good and bad—from resistance to conditions like diabetes to susceptibility to certain ...

The tree of life is often more like a vine that snakes back on itself, with tendrils briefly embracing before they reach for ...

Early humans may have reached adulthood around the same age as great apes, but with a slower, human-like pattern of tooth ...