In "Dolphins Up Close with Bertie Gregory," the National Geographic explorer looks to the camera and says, "Any day you see a dolphin is a good day." And that was Gregory's main objective for his ...

Whale watchers in Madeira captured the astonishing moment orcas took down the deep-diving marine mammal. The predatory ...

Adventure! These alluring Atlantic Ocean isles offer extraordinary sightings of marine life. Watch National Geographic’s ‘Dolphins Up Close With Bertie Gregory’ show. Plus, vacation ideas for you.

We already knew that bottlenose dolphins can follow "recipes" in preparing mollusks, help other species in distress, and possibly do math. So it may come as no surprise that the marine mammals also ...