"The remains of a medieval 'mummy' wrapped in a cocoon of birch bark [see video] has been discovered at the site of a village that belonged to a mysterious arctic civilisation." Source: Daily Mail.
"Archaeologists discovered the remains, which they believe may be a child or teenager from the 12th or 13th century, while excavating near the town of Salekhard in Tyumen Oblast, Russia."
Closer examination has now determined that the mummy is that of a child, probably a boy, between six or seven years old. According to the Siberian Times, "[s]cientists this week opened the mummified child's remains cocooned in birch bark and copper which - combined with the permafrost - produced an accidental mummification."
Note: This Siberian Times article has a lot of detailed, color images of this fairly gruesome find.
"Wrapped in reindeer hide and fur," and buried with a "child-sized bronze axe and bear's pendant," among other items, the body "was covered with copper or bronze plates on the face, chest, abdomen, groin - and bonded with leather cords. 'The items found with the body - the axe, pendant and rings - suggests 'this was not some poor boy'," according to one scientist. "The child warrior was 'not from the lower strata of society'.