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When Pollan decided to write about caffeine, he gave it up — cold turkey. "I just couldn't focus," he says. "I was irritable. I lost confidence." Caffeine reshapes the brain in surprising ways.

After five days of deliberation the jury concluded the weed killer was a "substantial factor" in causing non-Hodgkins lymphoma in the plaintiff. It's the second verdict against the Bayer product.

The name pays tribute to the legacy of African American women who played a major role in the space race but were long overlooked by history.

He was best known for his portrayal of Roy Batty, who is hunted down by a cop played by Harrison Ford, and expires with a sad soliloquy ending "Tears in the rain. Time to die."

President Trump doesn't believe a federal report that warns of the national security threats climate change poses to the United States and the world.

"He lived the American dream, and he wanted it for everyone else," House Speaker Nancy Pelosi said. The Baltimore congressman also helped to lead the impeachment inquiry into President Trump.

Much of the Santa Cruz River is a dry, desert wash, only flowing after heavy monsoon rains. As Tucson Water hydrologist Dick Thompson and I walk along the river south of Starr Pass Boulevard, he points out how brown the vegetation looks.

It's the second time the state of California will be testing out this warning system.

Regal fritillary butterflies have largely disappeared from the East Coast, save for a military base in central Pennsylvania. A few days each summer, hundreds descend for guided tours to see them.

Libraries have never been just about books; they're also crucial hubs of community support. Some are even expanding that role, and supporting their librarians, by bringing in trained social workers.