A new study finds that fish may get pleasure from being cleaned by other fish -- perhaps like the experience of getting a massage.

NPR's Ailsa Chang speaks with M. Gessen about the Trump administration moves to take over Washington D.C., and what it could mean for the future.

In Las Vegas, a team of water officers patrol city neighborhoods to make sure people aren't wasting water. Fines, the city has found, have helped reduce wasted water in an area that's in drought.