Explore the phenomenon of glowing ocean events known as milky seas, created by bioluminescent bacteria visible from space.

has been instrumental in getting more than two million square miles set aside—keeping untouched wild areas healthy and giving depleted ones a chance to recover. Five percent of the ocean is ...

Very close, it turns out. This month National Geographic’s newest experience, “Ocean Odyssey,” opens in Times Square in New York City, bringing visitors face-to-face with humpback whales ...