The styloid process allows the hand to lock into the wrist bones
The discovery of an ancient bone at a burial site in Kenya puts the origin of human hand dexterity more than half a million years earlier than previously thought.
In all ways, the bone - a well-preserved metacarpal that connects to the index finger - resembles that of modern man, PNAS journal reports.
It is the earliest fossilised evidence of when humans developed a strong enough grip to start using tools.
Apes lack the same anatomical features.Read the rest of this article...