Agriculture
Flush-Free Fertilizer
Growing Healthier Tomato Plants
Hungry bug seeks hot meal
Amphibians
Poison Dart Frogs
Salamanders and Newts
Tree Frogs
Animals
Revenge of the Cowbirds
New Mammals
Sleepless at Sea
Behavior
How Much Babies Know
Face values
Storing Memories before Bedtime
Birds
Pheasants
Carnivorous Birds
Macaws
Chemistry and Materials
Hitting the redo button on evolution
Picture the Smell
The Buzz about Caffeine
Computers
Batteries built by Viruses
Games with a Purpose
Hitting the redo button on evolution
Dinosaurs and Fossils
Dino Takeout for Mammals
Middle school science adventures
Early Birds Ready to Rumble
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Petrified Lightning
The Rise of Yellowstone
Earth from the inside out
Environment
Shrinking Fish
An Ocean View's Downside
A 'Book' on Every Living Thing
Finding the Past
Settling the Americas
Digging Up Stone Age Art
Oldest Writing in the New World
Fish
Whale Sharks
Salmon
A Grim Future for Some Killer Whales
Food and Nutrition
How Super Are Superfruits?
Turning to Sweets, Fats to Calm the Brain
Food for Life
GSAT English Rules
Who vs. Whom
Pronouns
Problems with Prepositions
GSAT Exam Preparation Jamaica
How are students placed after passing the GSAT exam
42,000 students will sit for the GSAT Exam in two weeks
2014 GSAT Results for Jamaican Kids
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT stars reap scholarship glory
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Setting a Prime Number Record
Math of the World
Human Body
Kids now getting 'adult' disease
Prime Time for Broken Bones
Attacking Asthma
Invertebrates
Camel Spiders
Dust Mites
Spiders
Mammals
Caribou
Dogs
Dolphins
Parents
Children and Media
How children learn
What Not to Say to Emerging Readers
Physics
IceCube Science
Hold on to your stars, ladies and gentlemen
Echoes of a Stretched Egg
Plants
Flower family knows its roots
Making the most of a meal
Fastest Plant on Earth
Reptiles
Lizards
Garter Snakes
Tortoises
Space and Astronomy
Evidence of a Wet Mars
Burst Busters
Baby Star
Technology and Engineering
Shape Shifting
Bionic Bacteria
Reach for the Sky
The Parts of Speech
Adjectives and Adverbs
What is a Noun
Countable and Uncountable Nouns
Transportation
Ready, unplug, drive
How to Fly Like a Bat
Robots on the Road, Again
Weather
Where rivers run uphill
Polar Ice Feels the Heat
Catching Some Rays
Add your Article

Slumber by the numbers

It’s an important question: “On an average school night, how many hours of sleep do you get?” More than 12,000 high school students were recently asked that during a survey by the Centers for Disease Control and Prevention. The overall answer: not enough. Studies have shown that teenagers really need at least nine hours of sleep, with eight hours considered a “borderline” acceptable amount. In the CDC study, however, only around 900 of the surveyed students reported getting the ideal amount, while an additional 2,800 reported averaging eight hours of shut-eye nightly. Danice Eaton, a research scientist at the CDC, led this most recent survey, which was part of what the agency calls a Youth Risk Behavior Surveillance. Every year, CDC scientists like Eaton ask high school students about behaviors that can harm their health. The questions are on topics such as nutrition, weapons, sex and drug use — and sleep. Sleeplessness, like other behaviors, carries a heavy toll. Scientists ask the survey questions to find a way to help people. Among people between the ages of 10 and 24, nearly three of every four deaths happen for one of the following reasons: motor vehicle accident, other accidents, homicide and suicide. Scientists like the CDC’s Eaton hope that by understanding the risky behaviors, like sleeplessness, that might contribute to these tragedies, they may be able to save lives. Also, without enough sleep, a person might have more trouble learning or exercising good judgment. Over time, people who regularly don’t get enough sleep are more likely to be obese (which means very overweight) or get sick with serious diseases, some studies have found. Other studies have shown that even one night with less sleep than needed can throw off the chemical balance of the body. Most students interviewed got much less than eight hours of sleep. Eaton and her team found that 30.2 percent, or about 3,600 students, sleep for only seven hours per night. About 2,700 students, or 22.8 percent, sleep only six hours per night. About 1,200 students, or 10 percent, reported sleeping five hours, and 5.9 percent, or 708 students, said they slept four hours or less. The CDC’s study identified a problem — but not the cause. Why do teenagers sleep less than they should? Maybe many teens like to work and stay up late. (This can make it rough to get up for school the next morning.) A number of scientific studies suggest some other ideas, as well. Computer use may be a culprit: Some scientists have found that the blue light given off by computer screens may interfere with the body’s internal biological clock — making it difficult to go to sleep. Other scientists have come up with new and interesting ways to help people who can’t sleep. Studies suggest, for example, that a person’s biological clock responds favorably to blue light that is the color of the sky. So perhaps people are biologically “set” to start their day when they see the sky — and when people see a blue computer screen, their bodies misinterpret the light as morning. Some research has shown that donning a pair of yellow glasses at night will block the blue wavelengths. This allows people to become naturally sleepy, even after a long night on the computer. Whatever the cause of too little sleep may turn out to be, the CDC’s effort to identify the problem is an early step toward finding a treatment. Once scientists understand the problem, they can design ways to solve it.

Slumber by the numbers
Slumber by the numbers








Designed and Powered by HBJamaica.com™