Human actions, such as incidental fishing and ineffective policies, push one-third of shark populations toward extinction.

Data shows that while retention bans are a positive first step, they alone won’t be sufficient to stop the ongoing decline.

Paleontologists at Mammoth Cave National Park have unearthed an ancient shark species previously unknown to science.

In the cold, lightless Pacific Ocean deep, the seabed is scattered with metal-rich rocks coveted by miners—and huge numbers ...