Adolescents can give their parents and teachers a scare. Many kids engage in street fights, binge on alcohol, take risks while driving and party late into the night with strangers. Teenagers simply tend to take more risks than adults — and brain scientists want to know why. A study offers new clues on why teens seem prone to taking costly chances or making unwise decisions.
For young...Readability Score: 7.7
Adolescence can mean facing the emotional challenges of adults for the first time. But what part of a teen’s brain processes those emotions depends on how mature that brain is, a new study finds.
As kids grow up, hormone levels will begin to surge in areas of their brains that manage emotions. The first surge starts deep within the brain. With time and maturity, some areas right behind...Readability Score: 7.5
In recent decades, Earth’s climate has been changing. That’s led to warmer temperatures and more very hot days. At the same time, levels of air pollution are growing. All that heat and dirty air will cause a lot more people to sicken — and even die. That’s the conclusion that emerges from three new analyses of climate trends in the eastern United States.Explainer: How scientists know Earth...Readability Score: 8.0
Waking and falling asleep do not happen the way researchers had thought they did, a new study suggests. Its results could affect how scientists understand sleep and awareness.
Neurons are the cells that power brain activity. Researchers thought that these cells decided when to switch the brain from sleep to wakefulness — and back again. However, these cells aren’t the brain’s only...Readability Score: 8.2
PHOENIX, Ariz. — The eyes of people with Alzheimer’s disease are, in some aspects, distinctly different from those of folks without this malady. That’s the finding of two teens. The changes they identified could offer reliable evidence of the disease in living people, the girls propose. More importantly, early signs of these changes might allow treatment for the disease before major symptoms...Readability Score: 7.8
Shiny green slices of jalapeño pepper adorn a plate of nachos. Chomping into one of those innocent-looking chilies will make a person’s mouth explode with spicy fireworks. Some people dread and avoid the painful, eye-watering, mouth-searing sensation. Others love the burn.
“A quarter of the world’s population eats chilies every day,” notes Joshua Tewksbury. He is a biologist who spent 10...Readability Score: 7.1
It’s not unusual for people to leave a rock concert with an incessant buzz or ringing in their ears. That’s one sign that the music was too loud. But power tools, especially lawn mowers and wood chippers, can be equally loud. Even heavy traffic can create a din that may pose a risk to hearing.
And sounds do not even have to be deafeningly intense to prove harmful.
Scientists...Readability Score: 7.1
“Fun is the number one reason kids play sports,” says David Bell. “And lack of fun is the number one reason kids quit.” Nothing takes the fun out of sports faster than an injury. That’s why Bell, an athletic trainer, conducted a new study to figure out why kids get hurt playing sports. And specializing in a single sport is a key risk factor, he and his team now find.
Their data are among...Readability Score: 7.7
Curves tend to put the brakes on human runners. They’re even harder for amputees using an artificial limb. Research now shows that even which leg the prosthesis is on can affect how fast someone can take a curve.
Two important forces are in play when a sprinter rounds a bend. First, working against gravity slows a runner. But centripetal (Sen-TRIP-eh-tul) force also is at work. It pulls...Readability Score: 7.3
Air pollution is bad for our lungs. It may not be great for our waistlines either, a new study in rats finds.
China's capital city of Beijing has some of the worst air pollution in the world. On really bad days, its air can host more than 10 times as many tiny pollutant particles as the World Health Organization says is safe for human health. In a new study, rats breathed in this air....Readability Score: 7.5