Satellite data reveals 21% of oceans have darkened, affecting photic zones and marine life. Researchers warn of severe ...

Affected swaths of ocean are roughly the same size as Africa, China, Europe and North America’s land areas combined.

Several key moments in Earth's history help us humans answer the question "How did we get here?" These moments also shed ...

Sharks may be fearsome, but they are also fascinating. Discover 10 shark facts that will change the way you see these ocean predators.