Bright Outdoor Lights Tied to Less Sleep, More Anxiety in Teenagers

Artificial outdoor light at night may disrupt adolescents’ sleep and raise the risk for psychiatric disorders, a new study suggests. Researchers tracked the intensity of outdoor light in representative urban and rural areas across the country using satellite data from the National Oceanic and Atmospheric Administration. They interviewed more than 10,123 adolescents living in these…

The Case for Smarter Coronavirus Testing

As Covid-19 continues to wreak havoc in communities around the country, many people are seeking tests for evidence either of the virus itself or antibodies to it, an indicator of past infection. Whatever the result, experts say, test seekers face challenges. Those fearing a current infection may have been exposed too long ago to still…