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Got Milk? How?
Watching out for vultures
Springing forward
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Frogs and Toads
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Salamanders and Newts
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Ultrasonic Frogs Raise the Pitch
Helping the Cause of Macaws
Koalas, Up Close and Personal
Behavior
Talking with Hands
Fear Matters
A brain-boosting video game
Birds
Geese
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Chemistry and Materials
Screaming for Ice Cream
Diamond Glow
Supersonic Splash
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Music of the Future
Toxic Dirt + Avian Flu = Science Fair Success
New twists for phantom limbs
Dinosaurs and Fossils
Did Dinosaurs Do Handstands?
A Rainforest Trapped in Amber
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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
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Pollution at the ends of the Earth
Wave of Destruction
What is groundwater
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Sea Otters, Kelp, and Killer Whales
Nanosponges Soak Up Pollutants
Finding the Past
Salt and Early Civilization
Sahara Cemetery
Settling the Americas
Fish
A Jellyfish's Blurry View
Great White Shark
Carp
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The Color of Health
Recipe for Health
Chocolate Rules
GSAT English Rules
Adjectives and Adverbs
Order of Adjectives
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GSAT Exam Preparation Jamaica
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Mastering The GSAT Exam
Results of GSAT are in schools this week
GSAT Exams Jamaica Scholarships
GSAT Scholarship
2014 GSAT Results for Jamaican Kids
GSAT Exam Preparation
GSAT Mathematics
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Deep-space dancers
A Sweet Advance in Candy Packing
Human Body
Dreaming makes perfect
Attacking Asthma
Hey batter, wake up!
Invertebrates
Worms
Ants
Scallops
Mammals
Chimpanzees
Bulldogs
Gerbils
Parents
Children and Media
The Surprising Meaning and Benefits of Nursery Rhymes
What Not to Say to Emerging Readers
Physics
Dreams of Floating in Space
Powering Ball Lightning
Extra Strings for New Sounds
Plants
Hungry bug seeks hot meal
Making the most of a meal
Plants Travel Wind Highways
Reptiles
Sea Turtles
Box Turtles
Cobras
Space and Astronomy
Pluto's New Moons
Saturn's New Moons
Unveiling Titan
Technology and Engineering
Morphing a Wing to Save Fuel
Beyond Bar Codes
A Light Delay
The Parts of Speech
What is a Noun
Pronouns
Countable and Uncountable Nouns
Transportation
Revving Up Green Machines
Middle school science adventures
Charged cars that would charge
Weather
Arctic Melt
The solar system's biggest junkyard
The Best Defense Is a Good Snow Fence
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Don't Eat That Sandwich!

Oops! In the rush to get to school, you drop a piece of toast on the floor. Do you throw it away or decide it's still OK to eat? If you're like most people, you eat it. Maybe you follow the "5-second rule," which claims foods are safe to eat if you pick them up within 5 seconds of dropping them. But you might want to think again. Scientists now say that 5 seconds are all it takes for foods to become contaminated with enough bacteria to make you sick. Bacteria are single-celled organisms that can cause many kinds of illnesses. Some kinds of bacteria can grow on food. If we eat foods on which these bacteria are growing, we can become sick. Common symptoms include vomiting and diarrhea. One of these food-borne bacteria is Salmonella. It makes 1.4 million people sick every year. Earlier this year, 370 people became sick after eating peanut butter that had been contaminated with Salmonella at the manufacturing plant. Salmonella are often found in raw eggs and chicken. Cooking kills these bacteria, which is why it is so important to cook eggs, chicken, and other foods thoroughly. Being a good housekeeper is a second tip for preventing infection. If household surfaces aren't washed thoroughly, they can support Salmonella for weeks. But how long does it take these bacteria to attach to food? To answer that question, a team of scientists at Clemson University in South Carolina decided to test the 5-second rule, using sandwich ingredients. First, they placed a known amount of Salmonella cells on three surfaces: wood, tile, and carpet. They placed a slice of bread and a slice of bologna on each surface for 5, 30, or 60 seconds. After just 5 seconds, both the bread and bologna picked up enough bacteria to make you sick. "Someone making a sandwich might follow someone who, a day before, used that surface to cut meat or another raw food. It might not look contaminated, but could have bacteria that would be harmful," said Paul Dawson, the food scientist who led the study. So, forget the 5-second rule. If your toast lands on the floor, toss it out. Stick a fresh slice of bread in the toaster. And this time, be careful not to drop it!—Jennifer Cutraro

Don't Eat That Sandwich!
Don't Eat That Sandwich!








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