Researchers in northern Greece have uncovered two massive tusks of a prehistoric mastodon that roamed Europe more than 2 million years ago — tusks that could be the largest of their kind ever found.

The remains of the mastodon, which was similar to the woolly mammoth but had straighter tusks as well as different teeth and eating habits, were found in an area about 250 miles north of Athens where excavations have uncovered several prehistoric animals over the past decade.