For a moment, she thought the shark was simply too exhausted. Then it righted itself and began to swim. Her legs were purple after charging into the freezing ocean, and she could feel the ...

Samples of whale shark skin reveal signs of possible diseases and pollutants, showing just how deeply human activity may ...

Sharks play a critical role in ocean ecosystems, and they're found in all of Earth's oceans. But many species are now under threat from climate change, overfishing, pollution and the shark fin trade.