A fossilized Pacific mastodon tooth believed to be at least 10,000 years old was found in “immaculate condition” in a California creek bed, according to local officials.

A fossilized Pacific mastodon tooth believed to be at least 10,000 years old was found in “immaculate condition” in a California creek bed, according to local officials.

A routine field survey in a California redwood forest has led to an extraordinary glimpse into the Ice Age. A scientist searching a San Mateo County creek for signs of habitat…