A draft of Pope Francis' encyclical on climate climate change was leaked Wednesday before its scheduled release.
Due to warm ocean temperatures, tens of thousands of red crabs are invading beaches in Southern California.
Individual differences in the brain's working memory could help explain why some teens are especially impulsive about sex. Having engaged parents helps reduce the risk.
If fruits and vegetables don't measure up to cosmetic standards, they're often plowed under in the field. One company wants to help change that by creating a market for less-than-perfect produce.
New data suggest that many regions in the world are overusing their underground water supplies. And researchers aren't sure how much remains.
And when the use of intrauterine devices and hormonal implants by young women goes up, the number of unplanned pregnancies sharply drops, researchers find.