Each killer whale has a distinct pattern of pigmentation behind its dorsal fin. How do these patterns vary around the world?

A unique fjord in Chilean Patagonia gives scientists a chance to unlock the reproductive secrets of cold-water corals that ...

In Hawai‘i, people, pigs, and ecosystems only have so much room to coexist, and the pigs exist a little too much.

Tundra Books It’s common for children to request their most beloved picture books on repeat. This counting book embraces this ...

Careful illumination helps showcase a bluebottle’s constituent bits, both above and below the water’s surface.

Francis “Bully” Mission Sr., president and founder of Mission Animal Control, is in a good mood when I meet him at a strip mall parking lot on the south side of the Hawaiian island of Kaua‘i. He and ...

In the 20th century, people’s demand for whale blubber and baleen drove industrial whalers to kill roughly three million whales—a whopping 99 percent of the world’s whale population. The intensive ...

In the late Miocene epoch, roughly 5.9 million years ago, calamity befell the Mediterranean Sea. In a period of roughly 600,000 years, tectonic uplift sealed the gateway between Europe and North ...

A sea cave on the northwest tip of Tonga’s Kapa Island is my favorite place on Earth. Nothing compares to freediving in the vibrant blue waters of Swallows Cave as beams of light and schools of fish ...

One Great Shot: Are You Ready for This, Jelly? During a nighttime dive, a veteran underwater photographer captured a tiny fish’s cunning effort to find a safe spot in a dark sea.