AU.S. college professor has discovered a dinosaur bone up to 200 million years old whilst walking through a university campus.

Mark McMenamin is a professor of geology at Mount Holyoke College in Massachusetts. He and his wife discovered the fossil whilst strolling through the grounds of University of Massachusetts Amherst in August, 2021.

There was construction work going on at the time, and McMenamin's wife Dianna asked the workers if she could take some rocks home with her for an ornamental garden. They said yes, and together the couple collected about 15 to 20 rounded stones.