Discovered in 1932 by gold prospectors the Caspar Mummy was found sixty miles west of the town of Caspar in Wyoming, in a gulch in the Pedro mountains.  The Caspar Mummy is often known simply as 'Pedro' after the place of its discovery.  Upon finding traces of gold the two gold prospectors used dynamite to blow away part of a wall to reveal a small cave, it was within this cave that the gold prospectors discovered Pedro.

Sat cross-legged the Caspar Mummy or Pedro measures only 14 inches in height and is said to be dark bronze in colour.  Upon discovery Pedro was sent to the Wyoming State Historical Society who had the Mummy x-rayed.  Despite Pedro being only 14 inches in height the x-rays revealed the Mummy to have a complete internal structure, with skull, spine, bones and a complete set of teeth.

Further tests by anthropologists from Harvard, the American museum of natural history and the Boston museum Egyptian department suggested that the Caspar Mummy was that of an adult.  It is believed that the man was killed by a blow to the head with a blunt object which smashed open the mans skull revealing the brain.

In way of explanation for the Caspar Mummy some believe him to be an infant that suffered from 'anencephaly' a developmental condition that leaves the brain and cranium incomplete, whilst others believe that Pedro is the remains of a member of a prehistoric native American culture that has eluded discovery.

The present location of Pedro is unknown.