Flush-Free Fertilizer
Keeping Bugs Away from Food
Protecting Cows—and People—from a Deadly Disease
Tree Frogs
Poison Dart Frogs
Gliders in the Family
Fishy Sounds
Little Beetle, Big Horns
Girls are cool for school
Babies Prove Sound Learners
A Light Delay
Chemistry and Materials
A Spider's Silky Strength
Atom Hauler
Earth from the inside out
Nonstop Robot
Look into My Eyes
Electronic Paper Turns a Page
Dinosaurs and Fossils
An Ancient Feathered Biplane
From Mammoth to Modern Elephant
A Big, Weird Dino
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
Deep History
Warmest Year on Record
Quick Quake Alerts
Seabirds Deliver Arctic Pollutants
Sea Otters, Kelp, and Killer Whales
Swimming with Sharks and Stingrays
Finding the Past
Ancient Cave Behavior
Digging Up Stone Age Art
Chicken of the Sea
Tiger Sharks
Megamouth Sharks
Manta Rays
Food and Nutrition
A Taste for Cheese
Packing Fat
Allergies: From Bee Stings to Peanuts
GSAT English Rules
Subject and Verb Agreement
Who vs. That vs. Which
Order of Adjectives
GSAT Exam Preparation Jamaica
How are students placed after passing the GSAT exam
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
The Annual GSAT Scholarships
GSAT Exams Jamaica Scholarships
GSAT stars reap scholarship glory
42,000 students will sit for the GSAT Exam in two weeks
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
Prime Time for Cicadas
Detecting True Art
Play for Science
Human Body
Prime Time for Broken Bones
Hear, Hear
Remembering Facts and Feelings
Raise a Lifelong Reader by Reading Aloud
How children learn
Children and Media
Spin, Splat, and Scramble
Electric Backpack
Strange Universe: The Stuff of Darkness
Surprise Visitor
City Trees Beat Country Trees
Nature's Alphabet
Space and Astronomy
A Moon's Icy Spray
Sounds of Titan
Roving the Red Planet
Technology and Engineering
Dancing with Robots
Searching for Alien Life
Riding Sunlight
The Parts of Speech
What is a Preposition?
Problems with Prepositions
Adjectives and Adverbs
Revving Up Green Machines
Middle school science adventures
Robots on the Road, Again
Watering the Air
Antarctica warms, which threatens penguins
Weekend Weather Really Is Different
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Quick Quake Alerts

The ground shakes. Dishes fall off shelves. Houses collapse. Cars topple over bridges. Every year, earthquakes destroy homes and schools, and they kill many thousands of people around the world. Even scarier, it's impossible to know exactly when and where the next one will strike. A system of detectors in Los Angeles might be able to warn that an earthquake is coming, according to a new analysis. Even if the alarm comes only a few seconds before the quake, the system could save lives. Earthquakes cause a few different kinds of underground vibrations. One kind are called P waves, which travel quickly through Earth and rarely cause damage. The S waves that follow are more dangerous. They travel half as fast and shake the ground from side to side. Richard M. Allen of the University of Wisconsin-Madison and his colleagues analyzed ground motions from 53 fairly strong earthquakes that have struck Los Angeles since 1995. By looking at the first few seconds of a quake’s P wave, they found they could predict how big the oncoming S wave would be. Using detectors already in place throughout Los Angeles could give residents at least a few seconds warning that a quake is coming, Allen suggests. That wouldn’t be enough time to run away. But a siren or Internet message could save lives by giving people time to shut off power and stop trains. Kids in school could dive under their desks. The system wouldn’t make earthquakes any less scary, but at least you’d know what was coming!—E. Sohn

Quick Quake Alerts
Quick Quake Alerts

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