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The U.S. has almost no domestic mineral smelters, compromising economic and military security. A nickel smelter proposed for a former North Dakota coal mine site could turn that around.

Over 200 priests, bishops and nuns are gathering at the Vatican for a three-week meeting focusing on the Amazon. Among the topics: ordaining older, married men to serve in remote communities.

In Florida on Tuesday, President Trump attended the opening of a migrant detention facility dubbed "Alligator Alcatraz." Officials say it can currently house 3,000 migrants before they're deported.

The Trump administration continues to pivot away from electric vehicles and cleaner gas cars., with President Trump announcing Wednesday a plan to roll back the clock on fuel economy standards.

A recent study in the journal Geology finds microorganisms trapped in an 830-million-year-old salt crystal. The researchers say it might still be alive.

Biologist Bill Streever sailed from Texas to Guatemala while doing research for his new book, And Soon I Heard a Roaring Wind. He says the wind was working against him "most of the time."

Studies show too much noise, particularly loud, irregular noise, can hurt a child's brain development, because if sound is irregular, it distracts our brains and makes concentration more difficult.

Hotter neighborhoods tend to be poorer in dozens of major U.S. cities. That extra heat can have serious health effects for those living there.

Well-meaning city dwellers forgo permits and official procedure to rewild urban areas across the country. In downtown LA, artist Doug Rosenberg is trying to push the grassroots movement forward.

For the latest developments in the investigation into the crash of Asiana Airlines Flight 214 in San Francisco, Renee Montagne talks to the head of the National Transportation Safety Board Deborah Hersman. Of the four pilots, investigators have only talked to two so far. More interviews will be conducted Tuesday.