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Springing forward
Awake at Night
Roach Love Songs
Chicken Talk
Pipefish power from mom
Internet Generation
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Flightless Birds
Chemistry and Materials
Mother-of-Pearl on Ice
Unscrambling a Gem of a Mystery
Hair Detectives
Games with a Purpose
A Classroom of the Mind
Graphene's superstrength
Dinosaurs and Fossils
A Living Fossil
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Earth's Poles in Peril
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Groundwater and the Water Cycle
Bald Eagles Forever
Indoor ozone stopper
Finding the Past
If Only Bones Could Speak
A Human Migration Fueled by Dung?
Childhood's Long History
Food and Nutrition
The Color of Health
Packing Fat
Sponges' secret weapon
GSAT English Rules
Who vs. Whom
Problems with Prepositions
Capitalization Rules
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Losing with Heads or Tails
Human Body
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A New Touch
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Basset Hounds
What Not to Say to Emerging Readers
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How children learn
The Mirror Universe of Antimatter
Invisibility Ring
One ring around them all
Sweet, Sticky Science
Bright Blooms That Glow
Hungry bug seeks hot meal
Box Turtles
Black Mamba
Space and Astronomy
A Family in Space
Icy Red Planet
Killers from Outer Space
Technology and Engineering
A Micro-Dose of Your Own Medicine
Young Scientists Take Flight
Switchable Lenses Improve Vision
The Parts of Speech
Problems with Prepositions
What is a Noun
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Charged cars that would charge
Reach for the Sky
Watering the Air
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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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