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The ozone layer is a thin shield in the stratosphere that protects humans and the environment from harmful levels of the sun's ultraviolet radiation.

The NTSB said Monday it will focus its investigation on why a Mexican Navy training ship crashed into the Brooklyn Bridge on three things: the crew, the vessel and the surrounding environment.

Chevron operates a major refinery in Richmond, Calif. It also owns the city's dominant news site, putting its own spin on events, and runs similar sites in Texas and Ecuador.

NPR's Scott Simon is dazzled by the turn of the seasons, especially the color of the leaves.

Steve Silberman talks about how Nazi extermination plans and a discredited scientific paper about childhood vaccines shaped our current understanding of autism. Originally broadcast Sept. 2, 2015.

From purple carrots and cabbage to grapes, the food industry is finding new ways to derive natural colors from plants. It's happening just as consumers are pushing Big Food to ditch artificial colors.

Space is an extreme environment filled with radiation, and next to no oxygen. To survive there, Lisa Nip says humans are going to have to change themselves ... genetically.

UPDATED 5:50 p.m. | The Lincoln Motor Co. said Tuesday it will not proceed with development of a new electric vehicle based on Rivian's skateboard…

New York's American Museum of Natural History holds the remains of some 12,000 people. The museum is removing human remains from public display and reviewing its repatriation procedures.

As an alternative to drab office buildings, immigration services are holding some citizenship ceremonies on Park Service land, to celebrate American heritage and nature.