Treating peanut allergy bit by bit
Watering the Air
Microbes at the Gas Pump
Frogs and Toads
Odor-Chasing Penguins
Ultrasonic Frogs Raise the Pitch
Awake at Night
The case of the headless ant
Island of Hope
Reading Body Language
Chemistry and Materials
Undercover Detectives
Revving Up Green Machines
Fog Buster
Graphene's superstrength
Lighting goes digital
Galaxies on the go
Dinosaurs and Fossils
Mammals in the Shadow of Dinosaurs
Teeny Skull Reveals Ancient Ancestor
Digging Dinos
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
Ancient Heights
Recipe for a Hurricane
Earth's Lowly Rumble
An Ocean View's Downside
The Birds are Falling
Catching Some Rays
Finding the Past
Ancient Cave Behavior
The Puzzle of Ancient Mariners
A Volcano's Deadly Ash
Manta Rays
Food and Nutrition
How Super Are Superfruits?
Recipe for Health
A Taste for Cheese
GSAT English Rules
Adjectives and Adverbs
Finding Subjects and Verbs
Who vs. Whom
GSAT Exam Preparation Jamaica
2014 GSAT Results for Jamaican Kids
Ministry of Education Announces 82 GSAT Scholarships for 2010
GSAT Scholarship
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
GSAT Mathematics
42,000 students will sit for the GSAT Exam in two weeks
It's a Math World for Animals
Monkeys Count
Human Body
Surviving Olympic Heat
A Long Trek to Asia
Speedy Gene Gives Runners a Boost
Vampire Bats
How children learn
Expert report highlights the importance to parents of reading to children!
Children and Media
The Pressure of Scuba Diving
Gaining a Swift Lift
IceCube Science
Bright Blooms That Glow
Fast-flying fungal spores
Farms sprout in cities
Space and Astronomy
Galaxies Divide Sharply Along Color Lines
Killers from Outer Space
A Planet's Slim-Fast Plan
Technology and Engineering
Shape Shifting
A Micro-Dose of Your Own Medicine
Algae Motors
The Parts of Speech
Adjectives and Adverbs
Problems with Prepositions
Revving Up Green Machines
Charged cars that would charge
Robots on a Rocky Road
Either Martians or Mars has gas
Where rivers run uphill
The Best Defense Is a Good Snow Fence
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™