Protecting Cows—and People—from a Deadly Disease
Seeds of the Future
Middle school science adventures
Tree Frogs
Salamanders and Newts
A Sense of Danger
Tool Use Comes Naturally to Crows
G-Tunes with a Message
Fear Matters
Primate Memory Showdown
Contemplating thought
Carnivorous Birds
Chemistry and Materials
Bandages that could bite back
The chemistry of sleeplessness
Cold, colder and coldest ice
Programming with Alice
A New Look at Saturn's rings
Small but WISE
Dinosaurs and Fossils
An Ancient Feathered Biplane
Dinosaurs Grow Up
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
Surf Watch
Less Mixing Can Affect Lake's Ecosystem
Easy Ways to Conserve Water
Fungus Hunt
Watching for Wildfires in Yellowstone
A Newspaper's Hidden Cost
Finding the Past
Of Lice and Old Clothes
Untangling Human Origins
A Long Trek to Asia
A Jellyfish's Blurry View
Food and Nutrition
Building a Food Pyramid
A Taste for Cheese
In Search of the Perfect French Fry
GSAT English Rules
Who vs. Whom
Whoever vs. Whomever
GSAT Exam Preparation Jamaica
Mastering The GSAT Exam
How are students placed after passing the GSAT exam
42,000 students will sit for the GSAT Exam in two weeks
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Exam Preparation
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
Setting a Prime Number Record
Prime Time for Cicadas
Monkeys Count
Human Body
Walking to Exercise the Brain
Surviving Olympic Heat
Hey batter, wake up!
Killer Whales
Choosing a Preschool: What to Consider
Raise a Lifelong Reader by Reading Aloud
How children learn
The Particle Zoo
Dreams of Floating in Space
Invisibility Ring
Cactus Goo for Clean Water
Bright Blooms That Glow
Surprise Visitor
Sea Turtles
Space and Astronomy
Saturn's Spongy Moon
Icy Red Planet
Sounds of Titan
Technology and Engineering
Riding Sunlight
Crime Lab
Roll-Up Computer Monitors to Go
The Parts of Speech
What is a Preposition?
What is a Noun
Countable and Uncountable Nouns
How to Fly Like a Bat
Reach for the Sky
Morphing a Wing to Save Fuel
Warmest Year on Record
In Antarctica watch the heat (and your step)
Arctic Melt
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Echoes of a Stretched Egg

You are what you eat, a familiar saying goes. When it comes to eggs, though, you don't even have to eat them to resemble one. Sound waves bounce off people as if each person were an enormous, stretched-out chicken egg, scientists reported recently at a meeting of the Acoustical Society of America. The discovery could help designers build better concert halls or other buildings where sound is important. The shape of an object determines which way sound bounces off of it. Two years ago, a pair of researchers from France discovered that they could use sound to determine the shape of an object as it moves around in a tank of water. This finding suggested the possibility of using sound as a way to identify and count different species of fish in the ocean automatically. Fish can be hard to handle, however, so the researchers chose to work first with people. In one experiment, people walked around inside a hard-walled room, while the scientists used microphones to record echoes of sounds produced by speakers. Participants ranged in age from 3 to 55 years. Analyses of the results showed that each person reflected sound in the same way as would an egg of his or her size. From the viewpoint of sound waves, most of us would have shapes that are somewhat taller and thinner than an average egg. Now, would you like your sounds scrambled, boiled, or fried?—E. Sohn

Echoes of a Stretched Egg
Echoes of a Stretched Egg

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