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New Gene Fights Potato Blight
Keeping Bugs Away from Food
Salamanders and Newts
Tree Frogs
Deep Krill
A Tongue and a Half
New Monkey Business
World’s largest lizard is venomous too
Ear pain, weight gain
How Much Babies Know
Chemistry and Materials
Supersonic Splash
Boosting Fuel Cells
Hitting the redo button on evolution
Computers with Attitude
The Earth-bound asteroid scientists saw coming
Electronic Paper Turns a Page
Dinosaurs and Fossils
Fossil Fly from Antarctica
Downsized Dinosaurs
Battling Mastodons
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
Killer Space Rock Snuffed Out Ancient Life
The Pacific Ocean's Bald Spot
A Dire Shortage of Water
Plastic Meals for Seals
When Fungi and Algae Marry
Out in the Cold
Finding the Past
The Taming of the Cat
Your inner Neandertal
Of Lice and Old Clothes
Mako Sharks
A Grim Future for Some Killer Whales
Skates and Rays
Food and Nutrition
Healing Honey
In Search of the Perfect French Fry
Recipe for Health
GSAT English Rules
Adjectives and Adverbs
Whoever vs. Whomever
GSAT Exam Preparation Jamaica
Mastering The GSAT Exam
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT stars reap scholarship glory
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
2014 GSAT Results for Jamaican Kids
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Mathematics
GSAT Practice Papers | GSAT Mathematics | Maths
Monkeys Count
Math and our number sense:
Human Body
Hear, Hear
Football Scrapes and Nasty Infections
A Long Haul
Walking Sticks
Camel Spiders
Sperm Whale
Raise a Lifelong Reader by Reading Aloud
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Children and Media
Powering Ball Lightning
The Pressure of Scuba Diving
Invisibility Ring
White fuzzy mold not as friendly as it looks
A Giant Flower's New Family
Tracking the Sun Improves Plant Pollen
Sea Turtles
Garter Snakes
Space and Astronomy
Baby Star
Sun Flips Out to Flip-Flop
Older Stars, New Age for the Universe
Technology and Engineering
Smart Windows
Slip Sliming Away
Beyond Bar Codes
The Parts of Speech
What is a Noun
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Countable and Uncountable Nouns
Robots on the Road, Again
Troubles with Hubble
Revving Up Green Machines
Polar Ice Feels the Heat
Science loses out when ice caps melt
Either Martians or Mars has gas
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Slower Growth, Greater Warmth

There seems little doubt that Earth is heating up. As temperatures rise, many people worry about how global warming may affect life on the planet. A long-term study in Central America gives one more reason for concern. Adult trees in a rain forest in Costa Rica grew more slowly in warm years than they did in cold ones. Such a shift toward slower-growing trees might make the climate warm up even faster. From 1984 to 2000, biologist Deborah A. Clark of the University of Missouri-St. Louis and colleagues measured the width of old trees in a 2-square-kilometer plot of rain forest at La Selva, Costa Rica. During the coolest years, a time period running from 1984 to 1986, the trees grew 81 percent faster than they did during a heat wave that struck in 1997. The trees also grew slowly in 1987, another warm year. In addition, scientists found that, during warm years, Earth's atmosphere contained less carbon dioxide produced by tropical land plants. Carbon dioxide is a heat-trapping gas, which plants normally use up to make food. The new results reinforce how important trees are to the health of the planet and how devastating a continued rise in temperatures might be to their future—and ours.—E. Sohn

Slower Growth, Greater Warmth
Slower Growth, Greater Warmth

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