Protecting Cows—and People—from a Deadly Disease
Keeping Bugs Away from Food
Hungry bug seeks hot meal
Salamanders and Newts
Poison Dart Frogs
Big Squid
G-Tunes with a Message
Sleep Affects a Bird's Singing
Making light of sleep
Giving Sharks Safe Homes
From dipping to fishing
Chemistry and Materials
Scientist Profile: Wally Gilbert
Boosting Fuel Cells
Revving Up Green Machines
A Light Delay
Graphene's superstrength
The Shape of the Internet
Dinosaurs and Fossils
Digging for Ancient DNA
A Really Big (but Extinct) Rodent
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
Snowflakes and Avalanches
Challenging the Forces of Nature
Digging into a Tsunami Disaster
Cactus Goo for Clean Water
Spotty Survival
To Catch a Dragonfly
Finding the Past
If Only Bones Could Speak
Ancient Art on the Rocks
Untangling Human Origins
Freshwater Fish
Food and Nutrition
Symbols from the Stone Age
Building a Food Pyramid
A Taste for Cheese
GSAT English Rules
Who vs. That vs. Which
Adjectives and Adverbs
GSAT Exam Preparation Jamaica
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
The Annual GSAT Scholarships
Tarrant High overcoming the odds
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
GSAT stars reap scholarship glory
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
Play for Science
Monkeys Count
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Human Body
Sun Screen
Flu Patrol
Speedy Gene Gives Runners a Boost
Horseshoe Crabs
Daddy Long Legs
Hermit Crabs
Sloth Bears
Children and Media
Choosing a Preschool: What to Consider
Raise a Lifelong Reader by Reading Aloud
Gaining a Swift Lift
Einstein's Skateboard
Extra Strings for New Sounds
Nature's Alphabet
Getting the dirt on carbon
Seeds of the Future
Snapping Turtles
Space and Astronomy
Rover Makes Splash on Mars
Sun Flips Out to Flip-Flop
Icy Red Planet
Technology and Engineering
Supersuits for Superheroes
Riding Sunlight
A Satellite of Your Own
The Parts of Speech
What is a Verb?
Adjectives and Adverbs
What is a Preposition?
Robots on a Rocky Road
Ready, unplug, drive
Seen on the Science Fair Scene
Watering the Air
Warmest Year on Record
Either Martians or Mars has gas
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Slip Slidin' Away—Under the Sea

Norwegian scientists have used computers to help solve the puzzle. They figure that undersea avalanches travel far and fast because the moving sediment rides on a thin layer of water trapped between the sediment and the seafloor. This water layer cuts down the friction, letting the sediment keep sliding for long distances, sometimes at high speed. Anders Elverhøi of the University of Oslo and his coworkers described their results in this month's Journal of Geophysical Research—Oceans. Something similar can happen to cars and trucks in wet weather. When traveling along a wet road, a car can lose its grip on the asphalt—making the car go into an uncontrollable slide. This loss of traction is known as "hydroplaning." It's caused by a layer of water between the tire and the road. Hydroplaning might explain the size and reach of a massive avalanche known as the Storegga slide. It took place in the Norwegian Sea about 8,000 years ago. Enough sediment to make up several mountains broke free in that avalanche, and some of slid nearly 500 kilometers. It can take much longer for debris to settle when an avalanche happens beneath the ocean. Underwater landslides can keep going and going—even along surfaces that are nearly flat. These huge, rolling masses of clay and silt sometimes wipe out plant and animal life over vast areas of the seafloor. What keeps ocean avalanches on the move? And, in a 1929 slide just south of Newfoundland, 300 to 700 cubic kilometers of sediment sped across the seafloor at nearly 80 kilometers per hour, snapping several transatlantic communication cables. Crabs, shrimp, and Nemo, get out of the way! Once an underwater landslide gets going, there's no stopping it until it's moved a long, long way.—S. McDonagh

Slip Slidin' Away—Under the Sea
Slip Slidin' Away—Under the Sea

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