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A Global Warming Flap
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Sweeeet! The Skinny on Sugar Substitutes
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Graphene's superstrength
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A Living Fossil
A Big, Weird Dino
Teeny Skull Reveals Ancient Ancestor
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
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A Great Quake Coming?
Ancient Heights
Undersea Vent System Active for Ages
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Animal CSI or from Science Lab to Crime Lab
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Settling the Americas
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GSAT Exam Preparation Jamaica
Preparing for the GSAT Exam
How are students placed after passing the GSAT exam
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
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2014 GSAT Results for Jamaican Kids
42,000 students will sit for the GSAT Exam in two weeks
GSAT Exam Preparation
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A Sweet Advance in Candy Packing
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Human Body
Football Scrapes and Nasty Infections
Teen Brains, Under Construction
Sun Screen
Invertebrates
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Sun Bear
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What Not to Say to Emerging Readers
Expert report highlights the importance to parents of reading to children!
Raise a Lifelong Reader by Reading Aloud
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Spin, Splat, and Scramble
Extra Strings for New Sounds
Echoes of a Stretched Egg
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Farms sprout in cities
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Surprise Visitor
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Komodo Dragons
Sea Turtles
Space and Astronomy
Burst Busters
A Whole Lot of Nothing
Asteroid Lost and Found
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Reach for the Sky
Crime Lab
Algae Motors
The Parts of Speech
Adjectives and Adverbs
What is a Noun
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Transportation
Ready, unplug, drive
Robots on the Road, Again
Middle school science adventures
Weather
Science loses out when ice caps melt
Catching Some Rays
A Dire Shortage of Water
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Cell Phone Tattlers

Your cell phone holds secrets about you. Besides the names and numbers that you've programmed into it, traces of your DNA linger on the device, according to a new study. DNA is genetic material that appears in every cell. Like your fingerprint, your DNA is unique to you—unless you have an identical twin. Scientists today routinely analyze DNA in blood, saliva, or hair left behind at the scene of a crime. The results often help detectives identify criminals and their victims. Meghan J. McFadden, a molecular biologist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the device. This made her wonder whether traces of DNA lingered on cell phones—even when no blood was involved. To find out, she and a colleague collected flip-style phones from 10 volunteers. They used swabs to collect invisible traces of the users from two parts of the phone: the outside, where the user holds it, and the speaker, which is placed at the user's ear. The scientists scrubbed the phones using a solution made mostly of alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones back for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more. The scientists discovered DNA that belonged to the phone's owner on each of the phones. Better samples were collected from the outside of each phone, but those swabs also picked up DNA that belonged to other people who had apparently also handled the phone. Surprisingly, DNA showed up even in swabs that were taken immediately after the phones were scrubbed. That suggests that washing won't remove all traces of evidence from a criminal's device. So cell phones can now be added to the list of clues that can clinch a crime-scene investigation.—Emily Sohn

Cell Phone Tattlers
Cell Phone Tattlers








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