Carolyn Beeler is a health and science reporter at WHYY in Philadelphia. She studied print journalism but caught the radio bug as a Kroc Fellow at NPR. Her work has taken her to the bottom of a bat cave and the middle of a jellyfish-infested bay, and her pieces have aired nationally on Morning Edition, All Things Considered and Weekend Edition. She has worked as a journalist in Chicago, Washington, D.C., Seattle and Cape Town, South Africa. Carolyn studied journalism at Northwestern University.
As a hunting bat closes in on a flying insect, its echolocation calls get closer and closer together, and shorter and shorter in duration. Scientists recently discovered how their muscles can produce more than 160 calls every second.
Coal produces nearly half the electricity in the U.S., but the mercury, sulfur dioxide and carbon dioxide it emits also makes it one of the most controversial energy sources. For many environmental activists, coal represents an old, dirty source of power, but for coal-mining communities around the country, the story is different.