The human body is a machine whose many parts – from the microscopic details of our cells to our limbs, eyes, liver and brain ...

When Au. afarensis was named as a new species in 1978, it was the earliest human ancestor ever documented, with an age range of 3.8 million to 3.0 million years ago.

In 1929, archaeologists discovered the 140,000-year-old skeleton of a young girl in Skhūl Cave. The researchers believed her ...

Discoveries in the past two decades have added new branches to the human family tree, including species such as the hobbit-like Homo floresiensis and the powerfully built Homo naledi.

When Homo sapiens appeared some 300,000 years ago, at least six other human species already shared the planet. Here, in the studio of paleoartist John Gurche, are model representations of those ...

Both ancient human species showed signs of simultaneously using their hands to move around – such as by climbing trees – as well as to grasp and manipulate objects, a requirement to being able ...

A million years ago, a species known as Homo erectus most likely survived in an arid desert with no trees. By Carl Zimmer Chimpanzees live only in African rainforests and woodlands. Orangutans ...