Molar from large mammal that once lived in North America is in ‘immaculate condition’ after discovery in Bay AreaA 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. Continue reading...

A researcher surveying a San Mateo County creek stumbled upon a preserved Pacific mastodon molar estimated to be at least 10,000 years old.