Agriculture
Getting the dirt on carbon
Middle school science adventures
Got Milk? How?
Amphibians
Salamanders and Newts
Tree Frogs
Newts
Animals
A Meal Plan for Birds
Koalas, Up Close and Personal
Stunts for High-Diving Ants
Behavior
The case of the headless ant
Monkeys in the Mirror
Fear Matters
Birds
Penguins
Crows
Dodos
Chemistry and Materials
Cooking Up Superhard Diamonds
Hitting the redo button on evolution
Music of the Future
Computers
Look into My Eyes
New twists for phantom limbs
It's a Small E-mail World After All
Dinosaurs and Fossils
South America's sticky tar pits
Three strikes wiped out woolly mammoths
Fossil Fly from Antarctica
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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
Groundwater and the Water Cycle
The Pacific Ocean's Bald Spot
Environment
Spotty Survival
Pollution Detective
Forests as a Tsunami Shield
Finding the Past
Traces of Ancient Campfires
Little People Cause Big Surprise
The Puzzle of Ancient Mariners
Fish
Parrotfish
Sharks
Piranha
Food and Nutrition
Chocolate Rules
Recipe for Health
Allergies: From Bee Stings to Peanuts
GSAT English Rules
Finding Subjects and Verbs
Problems with Prepositions
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
10 Common Mistakes When Preparing for the GSAT Math Test
Preparing for the GSAT Exam
Results of GSAT are in schools this week
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
GSAT Scholarship
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GSAT Mathematics
How to Slice a Cake Fairly
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Setting a Prime Number Record
Human Body
Nature's Medicines
Sea Kids See Clearly Underwater
The tell-tale bacteria
Invertebrates
Worms
Mollusks
Scallops
Mammals
Grizzly Bear
Wolverines
Chinchillas
Parents
Children and Media
How children learn
Choosing a Preschool: What to Consider
Physics
Project Music
Gaining a Swift Lift
The Pressure of Scuba Diving
Plants
Bright Blooms That Glow
Springing forward
Farms sprout in cities
Reptiles
Sea Turtles
Snapping Turtles
Chameleons
Space and Astronomy
An Icy Blob of Fluff
Return to Space
Planet Hunters Nab Three More
Technology and Engineering
Are Propellers Fin-ished?
Reach for the Sky
Smart Windows
The Parts of Speech
Adjectives and Adverbs
What is a Preposition?
Problems with Prepositions
Transportation
Troubles with Hubble
Where rivers run uphill
Seen on the Science Fair Scene
Weather
Antarctica warms, which threatens penguins
In Antarctica watch the heat (and your step)
A Change in Climate
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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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