From 1999 through 2012, teens got heavier. But by downing less sugar and eating more healthy fats, their bodies also showed signs that these teens were somewhat healthier.
A “couch potato” lifestyle of too much sugary, fatty food and too little exercise leads to health problems. This is known as metabolic syndrome.
Students who use smartphones and other mobile technology in class may well be driven to distraction. And that can hurt grades, studies show.
Questions for ‘When smartphones go to school’
DNA from a 50,000-year-old Neandertal woman’s toe bone shows humans left a mark on the ancient species — and much earlier than scientists had thought.
Americans’ grasp of science is improving. But a new study shows that adults’ scores can vary depending on how questions are phrased.
Researchers find that children and teens who gain too much weight see a near-simultaneous increase in blood pressure.
From Greenland to Utah to Jupiter, scientists unlock mysteries frozen in ice.
Questions for ‘Cool Jobs: Careers on ice’
A new ‘ouchless’ vaccine patch that uses dissolving microneedles could make efforts to vaccinate against measles more practical.
Air pollution now ranks as the world’s fourth leading cause of death. About 5.5 million deaths in 2013 trace to just one type, called particulates.
New technologies, including motorized prosthetics and stair-climbing wheelchairs, could someday help people overcome a range of disabilities.
A new design for football helmets uses three layers to absorb energy from repeated impacts. The result should be fewer athletes with brain injuries.
Lights can vary in brightness and ‘color’ — even those that are sold as white. A new study tested which lights attracted the most bugs.
Roadkill can be more than a smooshed-up carcass. Scientists study these highway casualties to learn more about wildlife and their environments.
Questions for ‘Roadkill: Learning from the dead’
Children introduced to sign language as babies performed better on mental-processing tasks at age 12 — and as adults — than did people who learned sign language at age 3.
Researchers working with mice found that allowing the body to rest after a concussion gave brain cells time to heal and reconnect with each other.
Citrus with health-boosting purple plant pigments don’t usually grow in warmer climates. Genetic engineering could change that.
New studies of e-cigarette vapor in animals and human cells find new risks to gene activity, behavior and male sperm.