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

More than 20 percent of the world’s oceans have darkened in the last two decades, posing a threat to marine life and ...

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

Open wide! The gaping gob of a pelican eel can expand into a voluminous sac for trapping elusive prey in the dark ocean depths.