Evolution Arms Us With an Extra Artery

Evolution Arms Us With an Extra Artery
AP Photo/Jim Mone

The human body continues to evolve in intriguing ways. New research in Australia has confirmed that more and more adults have a median artery in their forearms.

Or, more accurately, they have retained the median artery. It is the main vessel that supplies blood to the forearm and hand in the womb, but usually disappears once the radial and ulnar arteries develop.

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