The Bowers family was searching for shells at the Jersey Shore when they made the prehistoric discovery.
Researchers believe the tiny particles in the San Francisco Bay may originate from a variety of sources ranging from car tires to clothing fibers to plastic products. But a key question is their effect on marine life and potentially the broader food chain.
From a fast-melting snowpack in the Sierra to over-pumped groundwater in the Central Valley and a drought on the Colorado River, California's water supply is facing enormous pressure. Increasingly, some believe the only real alternative is to draw water from the Pacific Ocean offshore.
National Geographic has opened a new Museum of Exploration, aiming to connect visitors with explorers and their stories through immersive exhibits and artifacts spanning more than a century of discovery.
New UFO files have been released by the Trump administration that include several vivid descriptions of mysterious sightings in the sky.