Fossil-hunting diver finds piece of mastodon tusk off Florida's coast

ST. PETERSBURG, Florida: Fossil-hunting diver Alex Lundberg and his companion discovered a large piece of tusk from a long-extinct mastodon on the sea floor off Florida's Gulf Coast.

Initially, they thought the mastodon tusk was a long piece of wood.

The age of the tusk has yet to be determined. Mastodons are relatives of the mammoth family and modern-day elephants. Scientists say they lived in what is no