Strange 8.5-inch object found in California creek turns out to be 10,000-year-old mastodon tooth; scientist says, “I had chills and shivers up and down my spine”

A researcher in California was out for a routine field survey in a San Mateo County creek looking for an appropriate habitat for a threatened frog. But she was stunned when she stumbled upon an extraordinary discovery from the Ice Age, a remarkably preserved Pacific mastodon molar believed to be at least 10,000 years old, reports The Daily Beast. The discovery has shocked a paleontologist who said he had "hills and shivers up and down his spine"