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Cleaning Up Fish Farms
Got Milk? How?
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Color-Changing Bugs
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Night of the living ants
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The Disappearing Newspaper
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Pencil Thin
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Small but WISE
Electronic Paper Turns a Page
Games with a Purpose
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Mini T. rex
A Rainforest Trapped in Amber
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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
Detecting an Eerie Sea Glow
Surf Watch
Ancient Heights
Environment
Plant Gas
To Catch a Dragonfly
The Best Defense Is a Good Snow Fence
Finding the Past
Stone Tablet May Solve Maya Mystery
Fakes in the museum
The Taming of the Cat
Fish
Sturgeons
Goldfish
Electric Ray
Food and Nutrition
In Search of the Perfect French Fry
Food for Life
Healing Honey
GSAT English Rules
Finding Subjects and Verbs
Who vs. That vs. Which
Adjectives and Adverbs
GSAT Exam Preparation Jamaica
10 Common Mistakes When Preparing for the GSAT Math Test
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Exams Jamaica Scholarships
GSAT stars reap scholarship glory
Access denied - Disabled boy aces GSAT
Results of GSAT are in schools this week
GSAT Mathematics
Math and our number sense: PassGSAT.com
Prime Time for Cicadas
Math is a real brain bender
Human Body
Don't Eat That Sandwich!
Disease Detectives
Dreaming makes perfect
Invertebrates
Termites
Worms
Cockroaches
Mammals
Lion
Manatees
Bandicoot
Parents
The Surprising Meaning and Benefits of Nursery Rhymes
Children and Media
Raise a Lifelong Reader by Reading Aloud
Physics
Thinner Air, Less Splatter
Hold on to your stars, ladies and gentlemen
Powering Ball Lightning
Plants
Tracking the Sun Improves Plant Pollen
Farms sprout in cities
Sweet, Sticky Science
Reptiles
Crocodilians
Cobras
Gila Monsters
Space and Astronomy
Burst Busters
A Dead Star's Dusty Ring
World of Three Suns
Technology and Engineering
Slip Sliming Away
Switchable Lenses Improve Vision
Model Plane Flies the Atlantic
The Parts of Speech
What is a Preposition?
Countable and Uncountable Nouns
Adjectives and Adverbs
Transportation
Revving Up Green Machines
Morphing a Wing to Save Fuel
Tinkering With the Basic Bike
Weather
Weekend Weather Really Is Different
Where rivers run uphill
Warmest Year on Record
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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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