The shape of the hands is one of the last evolutionary mysteries of humankind. And we are one step closer to solving it

A study of over 2,000 primate wrist bones and 55 hominin fossils suggests the human wrist best fits a common ancestor adapted for knuckle-walking.

The findings challenge the idea that human wrists evolved mainly from ancestors with highly dexterous hands.

Researchers say precision grip and advanced manual skills likely appeared later in human evolution.

The work offers new evidence on how early hominins moved before fine manipulation and tool use became widespread.