Mastodon tusk chemical analysis reveals first evidence of one extinct animal's annual migration

Around 13,200 years ago, a roving male mastodon died in a bloody mating-season battle with a rival in what today is northeast Indiana, nearly 100 miles from his home territory, according to the first study to document the annual migration of an individual animal from an extinct species. A mounted skeleton of the Buesching mastodon, based on casts of individual bones produced in  fiberglass, on public display at the University of Michigan Museum of Natural History in Ann...