The Tooth That Time Forgot

The find of a lifetime might cost this college professor his life.

When Richard Calhoun finds a fossilized human molar while digging in the Canadian Rockies, he's sure he's made the discovery of his career.

Until the lab reveals that the tooth is 23,500 years old.

The news throws Calhoun's professional community into an uproar. His colleagues insist humans didn't arrive in the Americas before 12,500 years ago, when the last glaciers melted. They dismiss Calhoun's find as a fake and accuse him ...