Clothing factories in India can get pretty hot. How does that affect worker productivity? Researchers looked to the lights and gained an unexpected insight.
It's been four years since the attack on a flight in Ukraine killed several AIDS prevention advocates. Ahead of a conference, one advocate says they would have wanted to keep attention on the fight.
For much of her life, Maria Toorpakai has been threatened by extremist groups like the Taliban. Now the subject of a PBS documentary, she tells how she found the courage to keep playing sports.