The ocean is increasingly absorbing CO2 from the atmosphere, raising the water's acidity and endangering sea life.
Global warming is depleting oxygen in the water, creating and expanding "dead zones" toxic to sea life.
The ocean generates its own magnetic field, which peaks everty 12.5 hours along with the rising tides.
Sea currents create electric currents through a process called motional induction.
If salts are constantly washing into rivers, lakes and oceans, why aren't inland lakes salty as well?
I have a friend who says there's not much oxygen on earth. Ever since I heard that I can't catch my breath! What's the truth?
Where is the last place you would expect to find a seashell? Probably on the top of a mountain right?
These unique sharks have heads resembling flattened, T shaped hammers. But how would such a weird head evolve?
Learn how whales became sailors on this Moment of Science.
Barnacle geese leave Europe in spring and fly north to breed on rocky Arctic islands.