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Before you venture onto frozen ponds, lakes and rivers, it’s critical to make sure they’re safe, an expert cautions. “A minimum of four inches of clear, newly formed ice is needed to support one person on foot,” according to Curt Sinclair, a natural resources specialist at the University of Illinois, Urbana-Champaign. “New ice is usually…  read on >  read on >

It may be safe for many of America’s kids to head back to classrooms, experts at the U.S. Centers for Disease Control and Prevention announced on Friday. According to the agency’s new operational guidance, schools can safely reopen if they employ five key “layered mitigation” strategies based on the level of COVID-19 transmission in their…  read on >  read on >

If you like to take a snooze in the afternoon, your genes may explain your love of daytime naps, researchers say. For their study, investigators analyzed data from the UK Biobank, which contains genetic information from nearly 453,000 people who were asked how often they nap during the day. The genome-wide association study identified 123…  read on >  read on >

A new variant of COVID-19 found in Southern California is coursing across the United States and around the world, a new study finds. The variant — called CAL.20C — was first found in July in Los Angeles County. It reappeared in Southern California in October, then spread in November and December, with a regional surge…  read on >  read on >

Too much coffee during pregnancy could lead to kids with behavior problems later on. That’s the key takeaway from new research that examined 9,000 brain scans from 9- and 10-year-olds as part of the largest long-term study of brain development and child health. “The goalposts are moved by caffeine, and there are subtle, but real…  read on >  read on >

The United States will have enough COVID-19 vaccines to inoculate 300 million Americans by summer, President Joe Biden announced Thursday. During a tour of the National Institute of Health’s Viral Pathogenesis Laboratory, where the Moderna COVID-19 vaccine was created, Biden said his administration had secured the delivery of 600 million doses of the Moderna and…  read on >  read on >

Despite widespread efforts to increase access and awareness, new research shows there’s been virtually no change in the number of people on waiting lists for potentially lifesaving kidneys over the past two decades. For their study, scientists analyzed information on more than 1.3 million adults with kidney failure listed in the United States Renal Data…  read on >  read on >

When choosing a face mask to help prevent the spread of COVID-19, it seems like the choices are endless. To make the decision a little easier, researchers at the University of British Columbia in Vancouver, Canada, tested several styles in 41 types of fabric. The upshot: A mask made of two layers of low-thread-count quilting…  read on >  read on >