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.
NPR's Lulu Miller tells the story of one runner who always believed he could break the four-minute mile. Then a terrible accident made him question if he would ever be the same runner.
After four or five of his patients died from opioid overdoses in one month, Craig Smith, a family doctor in Bridgton, Maine, realized he couldn't wait for someone else to offer addiction treatment.
Citing growing evidence that no amount of lead exposure is safe for kids, the American Academy of Pediatrics has called for tighter regulations on the amount of lead in house dust, water and soil.
In the U.S., VapoRub goes on a sick child's chest. In Russia, it might go on the soles of the feet. Cultural norms have a big effect on how we diagnose and treat illnesses, especially at home.
We may be more accepting of boys who cry, but only if they cry in the right way, Hanna Rosin suggests. The norm for male behavior may be stuck in a place that isn't doing boys much good.
She was abducted at age 11 by Joseph Kony's rebels and forced to bear his children. It took Evelyn Amony years to recover. Now she works to help other women caught up in conflict.
One British performance artist does live shows about living with a constant compulsion to say the word "biscuit." Onstage and online, people with Tourette's syndrome are reaching out to clear the air.