Freediving next to a whale carcass is entering the ocean at its most primal. Tiger sharks circle in patterns that feel choreographed, lunging in with brutal precision as the water turns cloudy with ...

You jump in thinking about cobia and come face to face with something much heavier. Bull sharks move around you in slow, confident passes, and you try to act like you belong there while putting steel ...

Decades ago, India’s tigers were on the brink of extinction. Slowly, their numbers have rebounded. But that ecological success has prompted a dire problem—and a race to save many of them from genetic ...