On the Air: May 22, 2016
Davidson Seamount is located off the coast of central California. Credit: C. King, Monterey Bay National Marine Sanctuary

Volcanic mountains dot the west coast of the United States. Some are dormant, some are extinct — and some hide below the surface of the Pacific Ocean.

These underwater mountains are known as seamounts. And the first one ever listed as a seamount lies about 75 miles southwest of Monterey, California. It was discovered in 1933, and a few years later it was named for George Davidson, a leader in exploring America’s Pacific coast.

In Print: May 1, 2016
Zooplankton, crustacean larva seen under a microscope. Credit: National Oceanic and Atmospheric Administration, photographer: Matt Wilson/Jay Clark.

Tiny marine creatures known as zooplankton feed on phytoplankton, which use photosynthesis to create their food. Since phytoplankton tend to hang out at the ocean’s surface to absorb the sun’s energy, zooplankton head there for their meals each night. But when morning arrives, zooplankton become targets for predators, so they move to deeper waters during the day.