All vertebrate species have a pelvis, but only humans use it for upright, two-legged walking. The evolution of the human pelvis, and our two-legged gait, dates back 5 million years, but the precise ...

The monogamy rate in humans may be higher than you expected... but we do it in a strange way compared to other animals.

Two chimpanzees meeting with each other apparently have a discussion using hand gestures, one of the human-like characteristics of other mammals. (Getty Images) Of the 8.7 million species on Earth, ...

Of the 8.7 million species on Earth, why are human beings the only one that paints self-portraits, walks on the Moon and worships gods? For decades, many scholars have argued that the difference stems ...

Although often glossed over, the human liver is a pretty amazing organ. Not just because it’s pretty much the sole thing that prevents our food from killing us, but also because it’s the only organ in ...

Although it also performs some functions in men, estrogen, the main female sex hormone, is involved in a myriad of processes, ...

Human societies have long depended on the division of labor to thrive—walk into any town, and you can probably find bakers baking bread, truck drivers driving that bread to market and grocers selling ...