Sharks are the most feared predators in the sea, and their survival hinges on fearsome teeth that regrow throughout their lives. But changes in the ocean's chemistry could put those weapons at risk.

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STANFORD, Calif. (KGO) -- If you ever come face-to-face with the wrong kind of shark, there's something you probably want to avoid. Just a hint: they're long and really sharp. But now, researchers at ...

MOUNT PLEASANT — Like 49ers rushing west to find gold, Lowcountry residents have crowded the Crab Bank Seabird Sanctuary in search of shark teeth. Dozens of sharp-eyed scavengers spent the past few ...