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Watering the Air
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Frogs and Toads
Tree Frogs
Putting a Mouse on Pause
Firefly Delight
Not Slippery When Wet
Face values
Mind-reading Machine
How Much Babies Know
Chemistry and Materials
Butterfly Wings and Waterproof Coats
Cooking Up Superhard Diamonds
Graphene's superstrength
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It's a Small E-mail World After All
Hubble trouble doubled
Dinosaurs and Fossils
Dinosaur Dig
A Rainforest Trapped in Amber
Middle school science adventures
E Learning Jamaica
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
Coral Islands Survive a Tsunami
Earth's Poles in Peril
The Rise of Yellowstone
A Change in Climate
Groundwater and the Water Cycle
Eating Up Foul Sewage Smells
Finding the Past
An Ancient Childhood
Oldest Writing in the New World
Big Woman of the Distant Past
A Jellyfish's Blurry View
Mako Sharks
Food and Nutrition
The mercury in that tuna
Chew for Health
Chocolate Rules
GSAT English Rules
Order of Adjectives
Who vs. That vs. Which
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GSAT Exam Preparation Jamaica
Preparing for the GSAT Exam
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
GSAT Exams Jamaica Scholarships
GSAT Scholarship
42,000 students will sit for the GSAT Exam in two weeks
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
42,000 students will sit for the GSAT Exam in two weeks
Monkeys Count
Detecting True Art
Human Body
Music in the Brain
Nature's Medicines
Attacking Asthma
Choosing a Preschool: What to Consider
Children and Media
How children learn
Extra Strings for New Sounds
One ring around them all
Spin, Splat, and Scramble
Assembling the Tree of Life
White fuzzy mold not as friendly as it looks
Flower family knows its roots
Snapping Turtles
Space and Astronomy
Holes in Martian moon mystery
Slip-sliding away
A Dead Star's Dusty Ring
Technology and Engineering
Dancing with Robots
Bionic Bacteria
Are Propellers Fin-ished?
The Parts of Speech
Countable and Uncountable Nouns
What is a Verb?
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Morphing a Wing to Save Fuel
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A Dire Shortage of Water
Either Martians or Mars has gas
Warmest Year on Record
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Bionic Bacteria

Sometimes inanimate objects appear to act as if they're alive. Doors suddenly slam shut on their own, lights flicker on and off, or refrigerators gurgle and gasp. It's the spooky stuff of science fiction and horror movies. Get used to the idea. Living gadgets may be on their way. Two chemical engineers from the University of Nebraska in Lincoln have turned simple bacteria into electrical devices that measure humidity. The craziest part of all is that the bacteria must be alive for the gadgets to work at first. After they get going, the sensors work even when the tiny microbes die. To build the devices, the researchers started with a basic electrical device called a silicon chip. The chip contained gold electrodes, which are good at conducting electricity. Next, the engineers grew a coating of a type of bacteria called Bacillus cereus. These microbes grouped together and formed bridges between the electrodes. Finally, the researchers dipped the chips into a solution that contained minuscule gold beads with a coating that made them stick to the bacteria. To test their living sensors, the researchers passed electricity through the gold beads on the backs of the microbes that formed bridges. When humidity drops (which means that moisture levels in the air go down), the bacteria shrink. The distance between beads then decreases, so more electricity flows. This humidity detector is extremely sensitive. Lowering humidity from 20 percent to zero causes 40 times as much electricity to flow across the bridge. Now that researchers have figured out how to make a sensor out of living bacteria, they have set their sights on other devices. In the future, they hope to hitch microbes to electronic devices so that feeding these tiny captives results in a flow of electricity from the critters into the devices. Maybe microbe-powered batteries will someday run the really tiny iPods that your kids will use.E. Sohn

Bionic Bacteria
Bionic Bacteria

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