Researchers who compared peer-reviewed articles to the Wikipedia pages for the 10 most costly medical conditions in the U.S. discovered incorrect information on nine out of 10 pages. Dina Fine Maron reports

Thanks to us humans, there's a new type of rock in the geologic record. And it's part plastic. David Biello reports

Compared with 50 years ago, today's heroin user is whiter, more suburban and had prescription opioids for a gateway. Dina Fine Maron reports

When gas mileage cost was explicitly revealed on new car window stickers, potential consumers were more likely to choose the most efficient vehicle. David Biello reports.

Low-power laser light shined on damaged rat teeth activates growth factors that cue stem cells to generate the tooth constituent dentin, leading to regeneration.  Dina Fine Maron reports

In a May 21 speech Pope Francis warned that despoiling the environment would come back to haunt humanity. David Biello reports

Children of smokers who popped vitamin C during pregnancy had better lung function than kids of other women who also smoked during pregnancy. Dina Fine Maron reports

A building-sized poem shows how billboards could help cut pollution from cars. David Biello reports

Since the 1970s the locations where tropical cyclones (hurricanes and typhoons) reach their maximum intensities have shifted toward both poles at a rate of about 35 miles per decade. David Biello reports

Just a few nail drying sessions under the highest output UV bulbs used in some salons could age the skin and bump up the risk of skin cancer. Dina Fine Maron reports