Teen finds prehistoric mastodon jawbone in Iowa

In this May 14, 2019 photo, a juvenile mastodon's jaw bone is displayed temporarily while unwrapped from its plastic covering, at the University of Iowa Paleontology Repository on the University of Iowa campus in Iowa City, Iowa. A teen searching for arrowheads in southern Iowa found the prehistoric jawbone of a mastodon. The Iowa City Press-Citizen reports that the 30-inch bone belonged to a juvenile mastodon, an elephant-like animal believed to have roamed Iowa some 34,000 years ago. Officials with the University of Iowa Paleontology Repository, which now has possession of the bone found last week, say the mastodon might have stood around 7-feet tall. (Joseph Cress/Iowa City Press-Citizen via AP)