Shoulder bones fuel debate
Fossil shoulder blades suggest an ancient humanlike species may have been at home in the trees as well as on the ground
By Stephen Ornes, 13:47 PM November 16, 2012
Shoulder blades are the triangular bones that stick out of your back like small wings. Also known as scapulas, they connect different parts of the body. Without these bones, you couldn’t climb a tree. The surprising presence of them in a now-extinct humanlike species suggests it may have been a tree climber.
Many species have scapulas, although their shapes and sizes can differ. In a new study, scientists took a close look at the fossilized shoulder blades of a 3-year-old, humanlike species ...
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