Science

Science

Farewell, Cassini

After more than 20 years, NASA today said goodbye to the Cassini space probe and sent it plunging into Saturn's atmosphere to burn up. It was the end of a remarkable mission that revealed deep secrets of the ringed planet and its many moons.

Science

Research suggests a new reason for teens' risky behavior

Not long ago, the most popular explanation for any dangerous teenage behavior was raging hormones. Fast-forward a few years and the explanation changed: The teenage brain is actually biologically different. A teen’s prefrontal cortex is less developed than in adults. Now, a new study from the University of Pennsylvania suggests your teen’s bad decisions are driven by something else entirely.