More than one-fifth of the global ocean—an area spanning more than 75 million sq km—has been the subject of ocean darkening over the past two decades, according to new research. Ocean darkening occurs ...

Persistent lack of oxygen in Earth’s oceans affected animal evolution Photo of Little Horse Canyon near Orr Ridge, Utah. The oceans became oxygen-rich as they are today about 600 million years ago, ...

The oceans cover over 70% of the Earth’s surface. The marine ecosystem is the largest and most abundant in the world. But most of the ocean is permanently dark and incredibly difficult to observe. As ...

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

This zone contains a vast amount of marine life, potentially over 90% of all ocean life, and supports important commercial and recreational fisheries. Creatures in the twilight zone help mitigate ...