Add Yahoo as a preferred source to see more of our stories on Google. A woman discovered a rare shark tooth in Florida, offering a glimpse into prehistoric times. Nichole Mercuri, 26, was walking ...

Jacob Danner has searched a Florida beach for washed-up items almost every sunrise for the past year. But three weeks ago, Danner, an art curator, found his first megalodon tooth - 3 inches long, and ...

A group of German scientists tested the effects of a more acidic ocean on sharks' teeth and found that future generations of sharks could have weaker teeth.

A woman discovered a rare shark tooth in Florida, offering a glimpse into prehistoric times. Nichole Mercuri, 26, was walking along a Florida beach when she says she spotted a giant tooth that once ...