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Microbes at the Gas Pump
Middle school science adventures
Poison Dart Frogs
Salamanders and Newts
Mouse Songs
G-Tunes with a Message
Blotchy Face, Big-Time Wasp
Face values
Memory by Hypnosis
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
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Screaming for Ice Cream
Popping to Perfection
Atom Hauler
Programming with Alice
The hungry blob at the edge of the universe
New eyes to scan the skies
Dinosaurs and Fossils
The bug that may have killed a dinosaur
Ancient Critter Caught Shedding Its Skin
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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
Easy Ways to Conserve Water
Shrinking Glaciers
Earth from the inside out
Little Bits of Trouble
Ready, unplug, drive
Giant snakes invading North America
Finding the Past
Little People Cause Big Surprise
Preserving Ancient Warrior Paint
Writing on eggshells
Great White Shark
Food and Nutrition
The mercury in that tuna
Symbols from the Stone Age
Making good, brown fat
GSAT English Rules
Whoever vs. Whomever
Who vs. Whom
GSAT Exam Preparation Jamaica
GSAT Practice Papers | GSAT Mathematics | Maths
10 Common Mistakes When Preparing for the GSAT Math Test
The Annual GSAT Scholarships
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
2014 GSAT Results for Jamaican Kids
GSAT Practice Papers | GSAT Mathematics | Maths
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Detecting True Art
Prime Time for Cicadas
10 Common Mistakes When Preparing for the GSAT Math Test
Human Body
Tapeworms and Drug Delivery
Music in the Brain
Workouts: Does Stretching Help?
The Surprising Meaning and Benefits of Nursery Rhymes
Raise a Lifelong Reader by Reading Aloud
Choosing a Preschool: What to Consider
Gaining a Swift Lift
The Particle Zoo
Invisibility Ring
Nature's Alphabet
Hungry bug seeks hot meal
Plants Travel Wind Highways
Sea Turtles
Copperhead Snakes
Space and Astronomy
Black Holes That Burp
Sounds of Titan
Chaos Among the Planets
Technology and Engineering
Morphing a Wing to Save Fuel
A Satellite of Your Own
Riding Sunlight
The Parts of Speech
What is a Preposition?
What is a Verb?
Problems with Prepositions
Seen on the Science Fair Scene
Charged cars that would charge
Tinkering With the Basic Bike
Either Martians or Mars has gas
A Dire Shortage of Water
A Change in Climate
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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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