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Federal researchers returning from a 30-day expedition to study whales and dolphins around the Hawaiian Islands said they are looking for clues to help sustain healthy populations of the marine mammals.
The average surface temperature of Lake Tahoe has risen faster over the last four years than any time on record — 15 times faster than the long-term warming rate over the past half century, scientists say.
A wildfire burning along California's Big Sur coastline keeps growing a week after it broke out, and looks to be a problem for the scenic region for weeks to come.
Authorities say two police officers have been shot in a San Diego neighborhood, and a suspect is reportedly in custody.
It's a toothy giant that can grow longer than a horse and heavier than a refrigerator, a fearsome-looking prehistoric fish that plied U.S. waters from the Gulf of Mexico to Illinois until it disappeared from many states a half-century ago.