Agriculture
Watching out for vultures
Protecting Cows—and People—from a Deadly Disease
Got Milk? How?
Amphibians
Salamanders
Salamanders and Newts
Toads
Animals
Vampire Bats on the Run
New Elephant-Shrew
Sleep Affects a Bird's Singing
Behavior
The nerve of one animal
Listening to Birdsong
Internet Generation
Birds
Macaws
Pelicans
Quails
Chemistry and Materials
The newest superheavy in town
Getting the dirt on carbon
Revving Up Green Machines
Computers
Play for Science
Middle school science adventures
New twists for phantom limbs
Dinosaurs and Fossils
A Living Fossil
Tiny Pterodactyl
Middle school science adventures
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Results of GSAT are in schools this week
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Earth
Undersea Vent System Active for Ages
A Volcano's Deadly Ash
Coral Islands Survive a Tsunami
Environment
Little Bits of Trouble
Catching Some Rays
Whale Watch
Finding the Past
A Long Haul
Prehistoric Trips to the Dentist
Sahara Cemetery
Fish
A Jellyfish's Blurry View
Lampreys
Codfish
Food and Nutrition
Yummy bugs
The Color of Health
Building a Food Pyramid
GSAT English Rules
Problems with Prepositions
Who vs. Whom
Pronouns
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GSAT stars reap scholarship glory
42,000 students will sit for the GSAT Exam in two weeks
GSAT Scholarship
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GSAT Mathematics
How to Slice a Cake Fairly
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Detecting True Art
Human Body
Music in the Brain
A Long Trek to Asia
Remembering Facts and Feelings
Invertebrates
Daddy Long Legs
Nautiluses
Dust Mites
Mammals
Gazelle
Jaguars
Goats
Parents
Choosing a Preschool: What to Consider
The Surprising Meaning and Benefits of Nursery Rhymes
Raise a Lifelong Reader by Reading Aloud
Physics
Strange Universe: The Stuff of Darkness
Project Music
Black Hole Journey
Plants
Stalking Plants by Scent
Flower family knows its roots
The algae invasion
Reptiles
Boa Constrictors
Asp
Garter Snakes
Space and Astronomy
Pluto's New Moons
Return to Space
Witnessing a Rare Venus Eclipse
Technology and Engineering
Reach for the Sky
A Micro-Dose of Your Own Medicine
Machine Copy
The Parts of Speech
What is a Verb?
Problems with Prepositions
Pronouns
Transportation
Seen on the Science Fair Scene
Ready, unplug, drive
How to Fly Like a Bat
Weather
Science loses out when ice caps melt
Earth's Poles in Peril
In Antarctica watch the heat (and your step)
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Cousin Earth

As their search continues, astronomers are finding more and more planets orbiting nearby stars. This time, they've detected a solid planet that's just 15 light-years from Earth. Many details about the planet remain unknown because the astronomers didn't see it directly. Instead, they were able to detect how the planet's gravity makes its star wobble a little bit. Out of 156 planets discovered so far in other solar systems, the new extrasolar planet is the smallest one yet found. It's about 7.5 times heavier than Earth. Along with two, much bigger planets, the new world orbits a star called Gliese 876. The planet takes just 1.9 days to complete an orbit around Gliese 876. So, its year is much, much shorter than ours. It's so close to its star that its surface is hot enough to roast a chicken. Most extrasolar planets that have been found so far are big balls of gas, like Jupiter and Saturn. Because the planet's mass is low, it probably couldn't hold onto much gas. So, scientists suspect that it's rocky. "This could be the first [known] rocky planet around any normal star other than the sun," says team member Jack Lissauer of NASA's Ames Research Center in Mountain View, Calif. Scientists are still trying to figure out how rocky planets might form so close to their stars. Whatever the answer, the new discovery gives researchers confidence that they will one day find even closer cousins to Earth somewhere in the universe. And, on a planet resembling Earth, they might also discover traces of life as we know it.—E. Sohn

Cousin Earth
Cousin Earth








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