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Ancient hand bone dates origins of human dexterity
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 middle 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.
...
The 1.42 million-year-old metacarpal from an ancient hominin displays a styloid process, a distinctively human morphological feature associated with enhanced hand function.
http://www.bbc.co.uk/news/health-25398642
In all ways, the bone - a well-preserved metacarpal that connects to the middle 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.
...
The 1.42 million-year-old metacarpal from an ancient hominin displays a styloid process, a distinctively human morphological feature associated with enhanced hand function.
http://www.bbc.co.uk/news/health-25398642
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Inquiring lefties want to know.
