Middle school science adventures
Got Milk? How?
Hungry bug seeks hot meal
Odor-Chasing Penguins
Little Bee Brains That Could
Sleep Affects a Bird's Singing
Pondering the puzzling platypus
Wired for Math
Chemistry and Materials
Sweeeet! The Skinny on Sugar Substitutes
Cooking Up Superhard Diamonds
Graphene's superstrength
The Earth-bound asteroid scientists saw coming
Supersonic Splash
Games with a Purpose
Dinosaurs and Fossils
Meet your mysterious relative
Dinosaur Eggs-citement
A Really Big (but Extinct) Rodent
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Sky Dust Keeps Falling on Your Head
Killer Space Rock Snuffed Out Ancient Life
Warmest Year on Record
Spotty Survival
Lessons from a Lonely Tortoise
A Vulture's Hidden Enemy
Finding the Past
Childhood's Long History
Salt and Early Civilization
Stone Tablet May Solve Maya Mystery
Hammerhead Sharks
Flashlight Fishes
Food and Nutrition
How Super Are Superfruits?
Eat Out, Eat Smart
A Taste for Cheese
GSAT English Rules
Capitalization Rules
Finding Subjects and Verbs
Who vs. Whom
GSAT Exam Preparation Jamaica
GSAT Scholarship
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
GSAT Exams Jamaica Scholarships
GSAT Scholarship
Access denied - Disabled boy aces GSAT
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
A Sweet Advance in Candy Packing
Detecting True Art
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Human Body
Remembering Facts and Feelings
From Stem Cell to Any Cell
A New Touch
Kodiak Bear
What Not to Say to Emerging Readers
Choosing a Preschool: What to Consider
The Surprising Meaning and Benefits of Nursery Rhymes
Black Hole Journey
Extra Strings for New Sounds
Spin, Splat, and Scramble
Bright Blooms That Glow
Fastest Plant on Earth
Fungus Hunt
Space and Astronomy
Witnessing a Rare Venus Eclipse
Slip-sliding away
A Whole Lot of Nothing
Technology and Engineering
Are Propellers Fin-ished?
Spinach Power for Solar Cells
Space Umbrellas to Shield Earth
The Parts of Speech
Problems with Prepositions
Adjectives and Adverbs
What is a Noun
Flying the Hyper Skies
Reach for the Sky
Troubles with Hubble
In Antarctica watch the heat (and your step)
Either Martians or Mars has gas
The solar system's biggest junkyard
Add your Article

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

Designed and Powered by™