A woman taking a Memorial Day weekend stroll on a California beach found something unusual sticking out of the sand: a tooth from an ancient mastodon. But then the fossil vanished, and it took a media ...

A gigantic tooth that once belonged to an ancient mastodon was discovered, lost and then found again over Memorial Day weekend, after a tourist saw and photographed it on a California beach without ...

Every so often, without swinging a pick or lifting a shovel, professional diggers discover scientific treasures. Browsing through the modest collections of amateur “rock hounds,” they have found many ...