Australian sea lions wearing video cameras showed scientists a whole new world on the ocean floor. The footage revealed surprisingly diverse habitats like sponge gardens, coral reefs, and kelp reefs.

We're more connected to the ocean than you may think, and naturalist Sir David Attenborough is ready to share his findings in the new National Geographic documentary, "Ocean with David Attenborough." ...

Scientists discovered a giant underwater mountain. And it's teeming with deep sea life. An endeavor aboard the Falkor (too) — a 363-foot (111-meter) research vessel operated by the Schmidt Ocean ...