Excess nutrients trigger algae blooms that block sunlight and drain oxygen. The result is a slow, silent death for entire ecosystems.

The 19th-century American naturalist Henry David Thoreau described the small freshwater lake at Walden as "Earth's eye"—a measure of the complexity of ecological interactions.

The failure of a vital ocean upwelling has sparked concerns of catastrophic effects for life, according to scientists.

Hidden within Arctic ice, diatoms are proving to be anything but dormant. New Stanford research shows these glass-walled ...