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Mating Slows Down Prairie Dogs
Insects Take a Breather
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When Darwin got sick of feathers
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The metal detector in your mouth
When frog gender flips
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Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Earth
Weird, new ant
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If Only Bones Could Speak
Sahara Cemetery
The Taming of the Cat
Fish
Marlin
Freshwater Fish
Barracudas
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Making good, brown fat
Chocolate Rules
Allergies: From Bee Stings to Peanuts
GSAT English Rules
Problems with Prepositions
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Capitalization Rules
GSAT Exam Preparation Jamaica
42,000 students will sit for the GSAT Exam in two weeks
Tarrant High overcoming the odds
2014 GSAT Results for Jamaican Kids
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GSAT stars reap scholarship glory
Results of GSAT are in schools this week
GSAT Scholarship
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Prime Time for Cicadas
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How to Slice a Cake Fairly
Human Body
Walking to Exercise the Brain
Sea Kids See Clearly Underwater
Smiles Turn Away Colds
Invertebrates
Clams
Insects
Sea Anemones
Mammals
Dolphins
Deers
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Parents
Children and Media
Expert report highlights the importance to parents of reading to children!
How children learn
Physics
Dreams of Floating in Space
Strange Universe: The Stuff of Darkness
Gaining a Swift Lift
Plants
The algae invasion
Springing forward
Underwater Jungles
Reptiles
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Chameleons
Tortoises
Space and Astronomy
A Planet from the Early Universe
An Icy Blob of Fluff
Pluto's New Moons
Technology and Engineering
Slip Sliming Away
Algae Motors
Space Umbrellas to Shield Earth
The Parts of Speech
Adjectives and Adverbs
What is a Preposition?
Countable and Uncountable Nouns
Transportation
Charged cars that would charge
How to Fly Like a Bat
Robots on the Road, Again
Weather
The solar system's biggest junkyard
Either Martians or Mars has gas
A Dire Shortage of Water
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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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