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In mice, monkeys and people, exercise releases a protein called cathepsin B. And as blood and brain levels of this protein rise, memory gets better. But the protein has a dark side, too.

Ortho is part of the Miracle-Gro family. The company says it decided to phase out neonics from its home and garden products after reviewing possible threats posed to bees and other pollinators.

Dear Sugar Radio is a podcast offering "radical empathy" and advice for the lost, lonely and heartsick. Today the hosts hear from a woman wondering whether her fiancé's porn addiction can be helped.

During his four years as a prisoner, professor Ajmal Khan came across boys in remote Waziristan who were hungry to learn. He taught them math and science, but his captivity became a lesson, too.

Two years after protesters shut down the city's financial center, a handful of the activists have won seats in the city's legislature. Now that they're in office, what does it mean for Hong Kong?

Sibling relationships are usually the longest-lived family ties, and most adults say they're close to their siblings. That closeness can shelter and sustain us through life's perils and joys.

More than half of Republicans and Democrats now have "very unfavorable" views of the opposing party, continuing a trend that's been going on for decades.

The unusual meeting was called to consider a ban on certain uses of a new technique that can make precise changes in DNA. The main concern is altering genes in human sperm, eggs and embryos.

Airs Wednesday, September 2, 2015 at 9 p.m. on KPBS TV

The approach made popular by Alcoholics Anonymous doesn't work for most people, according to psychiatrist Lance Dodes. In fact, he says, the steps can actually be harmful to the majority of addicts.