Why do we know more about the surface of Mars than we do about the ocean floor?

What is a red tide?

8 species moving to cooler waters

Reef fish sing a 'dawn chorus' like songbirds

Earth gets a surge of new ocean sanctuaries

California law bans use of orcas for breeding, entertainment

Can the moon's gravity cause earthquakes?

Threatened loggerhead sea turtles are nesting in record numbers

Giant reef with doughnut-shaped structures found 'hiding' behind Great Barrier Reef

Swimming with dolphins may soon be banned in Hawaii

Sea urchins have the weirdest way of being born

8 close calls with whales