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From lemons to ham, salt is a handy food preservative. But researchers studying some really old salt crystals found them preserving something else — evidence of life.

On her new album, the opera star suggests Mother Nature has a lot to teach us, if we'd only listen.

Because of waves from Saturday's eruption, an estimated 6,000 barrels of oil were spilled near Peru's main refinery on the coast in an area rich in marine biodiversity.

The NIH will track the diets and lifestyles of 10,000 people to see how genetics, biology and the microbiome impact people's health. The study will use AI to tailor individual diet advice.

A long-planned upgrade to a critical piece of infrastructure at the state complex in downtown Albany was unveiled Monday.

The high-level portion of the United Nations climate talks start in Bali, Indonesia, with pleas for urgent action from countries to help reduce global warming. Australia made a splash by signing on to the Kyoto treaty, while the U.S. is the only industrial nation to boycott the international treaty.

EPA Administrator Michael Regan says the nation's water infrastructure needs to be "stronger and more resilient to face the climate change impacts that we are seeing right here right now."

A leaked document from the Environmental Protection Agency suggests that the agency is considering a significant change in air-pollution rules. It would give chemical factories, refineries and manufacturing plants new leeway to increase emissions of pollutants that can cause cancer and birth defects.

Huge windmills -- promoted as a source of clean, renewable power -- are sprouting up on mountaintops in the Appalachian states. But some local opponents say the tall turbines blight the rural landscape.

Today's sealed and insulated houses mean indoor air is often more polluted than the air outside. Cigarette smoke, pet allergens, and fumes from cleaners are increasingly trapped inside, along with chemicals released from insulation, paint and carpeting. NPR's Jon Hamilton reports on what researchers know about indoor air quality.