Fossilized 10,000-year-old mastodon tooth found by California scientist

Molar from large mammal that once lived in North America is in immaculate condition' after discovery in Bay Area

A 10,000 year-old tooth in remarkable condition from an ancient Pacific mastodon, a large mammal that once inhabited North America, was recently discovered by a California scientist.

Brigid Lynch, a geomorphologist, was working at a preserve in San Mateo county, when she stumbled across a peculiar rock.