Mastodon tusk analysis reveals new evidence of migration

Around 13,200 years ago, a roving male mastodon died in a bloody mating-season battle with a rival in what is present-day northeast Indiana. Chemical analysis of the right tusk from this extinct animal, which is known as the Buesching mastodon, showed for the first time that large male mastodons like Buesching migrated each year to their mating grounds.
The study, published in Proceedings of the National Academy of Sciences, was led by researchers at the University of Cincinnati and the University of Michigan.
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