Agriculture
Where Have All the Bees Gone?
Protecting Cows—and People—from a Deadly Disease
Growing Healthier Tomato Plants
Amphibians
Toads
Newts
Salamanders
Animals
Hearing Whales
Polar Bears in Trouble
Blotchy Face, Big-Time Wasp
Behavior
Surprise Visitor
Night of the living ants
Honeybees do the wave
Birds
Cranes
Woodpecker
Songbirds
Chemistry and Materials
The metal detector in your mouth
Pencil Thin
Getting the dirt on carbon
Computers
Batteries built by Viruses
Earth from the inside out
Seen on the Science Fair Scene
Dinosaurs and Fossils
Big Fish in Ancient Waters
Have shell, will travel
Three strikes wiped out woolly mammoths
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
The Rise of Yellowstone
Vitamin D-licious Mushrooms
Sky Dust Keeps Falling on Your Head
Environment
Fungus Hunt
Plastic Meals for Seals
Out in the Cold
Finding the Past
Sahara Cemetery
Writing on eggshells
Settling the Americas
Fish
Halibut
Goldfish
Cleaning Up Fish Farms
Food and Nutrition
In Search of the Perfect French Fry
How Super Are Superfruits?
Food for Life
GSAT English Rules
Adjectives and Adverbs
Who vs. Whom
Problems with Prepositions
GSAT Exam Preparation Jamaica
Results of GSAT are in schools this week
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
42,000 students will sit for the GSAT Exam in two weeks
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
GSAT Exam Preparation
GSAT stars reap scholarship glory
GSAT Mathematics
Secrets of an Ancient Computer
Monkeys Count
Math Naturals
Human Body
Teen Brains, Under Construction
Electricity's Spark of Life
Disease Detectives
Invertebrates
Spiders
Krill
Butterflies
Mammals
Cape Buffalo
Cats
Ponies
Parents
How children learn
Children and Media
Raise a Lifelong Reader by Reading Aloud
Physics
Powering Ball Lightning
Gaining a Swift Lift
IceCube Science
Plants
When Fungi and Algae Marry
City Trees Beat Country Trees
Flower family knows its roots
Reptiles
Komodo Dragons
Garter Snakes
Reptiles
Space and Astronomy
Sun Flips Out to Flip-Flop
Slip-sliding away
A Very Distant Planet Says "Cheese"
Technology and Engineering
Smart Windows
Roll-Up Computer Monitors to Go
Riding Sunlight
The Parts of Speech
Adjectives and Adverbs
Problems with Prepositions
Pronouns
Transportation
Robots on the Road, Again
Are Propellers Fin-ished?
Where rivers run uphill
Weather
A Dire Shortage of Water
The solar system's biggest junkyard
Earth's Poles in Peril
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Electric Backpack

Backpacks are convenient. They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you don't mind carrying a heavy load, your backpack might also power your MP3 player, keep your cell phone running, and maybe even light your way home. Scientists from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole, Mass., have invented a backpack that makes electricity from energy produced while its wearer walks. The backpack's electricity-creating powers depend on springs used to hang a cloth pack from its metal frame. The frame sits against the wearer's back, and the whole pack moves up and down as the person walks. A mechanism with gears collects energy from this motion and transfers it to an electrical generator. Surprisingly, the researchers found, people walk differently when they wear the springy packs. As a result, wearers use less energy than when lugging regular backpacks. Also, the way the new packs ride on wearers' backs makes them more comfortable than standard packs, the inventors say. The backpack could be especially useful for soldiers, scientists, mountaineers, and emergency workers who typically carry heavy backpacks. These people often rely on global positioning system (GPS) receivers, night-vision goggles, and other battery-powered devices to get around and do their work. Because the pack can make its own electricity, users don't need to give up space in their packs to lots of extra batteries. For the rest of us, power-generating backpacks could make it possible to walk, play video games, watch TV, and listen to music, all at the same time. Electricity-generating packs aren't on the market yet, but if you do get one eventually, just make sure to look both ways before crossing the street!—E. Sohn

Electric Backpack
Electric Backpack








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