The Lucy fossil’s role in human evolution is debated: new discoveries question whether she was truly our direct ancestor.

This has been quite the wild year in human evolution stories. Our relatives, living and extinct, got a lot of attention—from ...

New study of 7-million-year-old fossils from Chad proves Sahelanthropus tchadensis walked upright while still climbing trees.

A new fossil analysis supports the idea a human ancestor was walking upright far earlier than previously thought.

The year's top paleontological wonders ranged from a 540-million-year-old penis worm to a decades-old rodent impression.

Scientists may have cracked the case of whether a seven-million-year-old fossil could walk upright. A new study found strong ...

In recent decades, scientists have debated whether a seven-million-year-old fossil was bipedal—a trait that would make it the ...

A long-running and bitterly fought dispute over whether the earliest known hominin had a knuckle-walking gait, like ...

Scientists argue ape-like Sahelanthropus tchadensis that lived in Africa 7m years ago is best contender but more fossils are needed ...

Anthropologists have uncovered evidence of an ancient ape species that roamed Africa on two feet seven million years ago, ...

A new analysis of fossils uncovered in Central Africa offers additional evidence that a human ancestor walked upright 7 million years ago.