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Hungry bug seeks hot meal
Growing Healthier Tomato Plants
Microbes at the Gas Pump
Amphibians
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Toads
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Tool Use Comes Naturally to Crows
Moss Echoes of Hunting
Stunts for High-Diving Ants
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Fighting fat with fat
Pollution at the ends of the Earth
Giving Sharks Safe Homes
Birds
Kiwis
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Flightless Birds
Chemistry and Materials
Undercover Detectives
A Framework for Growing Bone
A Light Delay
Computers
A Light Delay
Hitting the redo button on evolution
Batteries built by Viruses
Dinosaurs and Fossils
Digging for Ancient DNA
An Ancient Feathered Biplane
Dino Babies
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Earth
Watering the Air
Pollution at the ends of the Earth
Sky Dust Keeps Falling on Your Head
Environment
Fungus Hunt
A 'Book' on Every Living Thing
Groundwater and the Water Cycle
Finding the Past
Digging Up Stone Age Art
Of Lice and Old Clothes
The Puzzle of Ancient Mariners
Fish
Puffer Fish
Sting Ray
Mako Sharks
Food and Nutrition
Sponges' secret weapon
Food for Life
Turning to Sweets, Fats to Calm the Brain
GSAT English Rules
Pronouns
Who vs. Whom
Subject and Verb Agreement
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GSAT stars reap scholarship glory
How are students placed after passing the GSAT exam
Preparing for the GSAT Exam
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Prime Time for Cicadas
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Taking the sting out of scorpion venom
What the appendix is good for
Heart Revival
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Giant Clam
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Cornish Rex
Blue Whales
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What Not to Say to Emerging Readers
How children learn
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Black Hole Journey
Speedy stars
Invisibility Ring
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Nature's Alphabet
Cactus Goo for Clean Water
When Fungi and Algae Marry
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Garter Snakes
Space and Astronomy
Intruder Alert: Sweeping Space for Dust
Catching a Comet's Tail
Galaxies Divide Sharply Along Color Lines
Technology and Engineering
Smart Windows
Squeezing Oil from Old Wells
Morphing a Wing to Save Fuel
The Parts of Speech
Countable and Uncountable Nouns
What is a Preposition?
Adjectives and Adverbs
Transportation
Robots on a Rocky Road
Morphing a Wing to Save Fuel
Seen on the Science Fair Scene
Weather
Science loses out when ice caps melt
Antarctica warms, which threatens penguins
Warmest Year on Record
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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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