sharks

Why have dozens of great white sharks turned up around Southern California beaches recently? Finding the answer led to a close-up view of a baby great white shark — and the researcher who caught her.

This Arctic species can live longer than any other known animal advanced enough to have a backbone, scientists say — maybe more than 500 years. Their muscles might hold clues that could help humans.

Beginning Friday, an aquarium in Tacoma will let paying visitors dive in a shark-infested tank.The Point Defiance Zoo and Aquarium has built a dive cage…