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Hungry bug seeks hot meal
Got Milk? How?
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Professor Ant
Tool Use Comes Naturally to Crows
Helping the Cause of Macaws
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The Disappearing Newspaper
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Big Machine Reveals Small Worlds
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Dino Flesh from Fossil Bone
Have shell, will travel
An Ancient Feathered Biplane
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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
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Surf Watch
Watering the Air
Farms sprout in cities
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Missing Tigers in India
When Fungi and Algae Marry
The Best Defense Is a Good Snow Fence
Finding the Past
Digging Up Stone Age Art
Fakes in the museum
A Plankhouse Past
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White Tip Sharks
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The Essence of Celery
Eat Out, Eat Smart
Healing Honey
GSAT English Rules
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Who vs. That vs. Which
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GSAT Exam Preparation
Tarrant High overcoming the odds
Mastering The GSAT Exam
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Access denied - Disabled boy aces GSAT
42,000 students will sit for the GSAT Exam in two weeks
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
10 Common Mistakes When Preparing for the GSAT Math Test
It's a Math World for Animals
Losing with Heads or Tails
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A New Touch
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Giant Squid
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Choosing a Preschool: What to Consider
Raise a Lifelong Reader by Reading Aloud
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Dreams of Floating in Space
Hold on to your stars, ladies and gentlemen
Echoes of a Stretched Egg
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Stalking Plants by Scent
Farms sprout in cities
City Trees Beat Country Trees
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Box Turtles
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Asp
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A Family in Space
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Burst Busters
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Bionic Bacteria
A Clean Getaway
Weaving with Light
The Parts of Speech
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What is a Noun
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Revving Up Green Machines
Tinkering With the Basic Bike
Robots on a Rocky Road
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Where rivers run uphill
Polar Ice Feels the Heat
Antarctica warms, which threatens penguins
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Older Stars, New Age for the Universe

The universe has been around for an extra long time. Astronomers used to estimate that the oldest stars were about 13 billion years old. New data suggest that these stars are nearly a billion years older than that. For most of its life, a star produces energy and heat by fusing hydrogen to make helium inside its core. Near the end of its life, when its hydrogen supply is running low, the star continues to convert hydrogen into helium but requires the presence of carbon, nitrogen, and oxygen to do so. Two teams of scientists have now used particle accelerators—atom smashers—to mimic the conditions inside stars. By studying high-energy collisions between hydrogen nuclei (protons) and nitrogen nuclei, the researchers could check how quickly nuclear reactions inside a star proceed. Both groups, one at the University of North Carolina at Chapel Hill and the other at the National Institute for Nuclear Physics in Italy, found that the reactions occur only half as fast as had been estimated. Such a slow reaction time allows gravity to shrink a star more than it would if the reaction were faster. As a result, an elderly star looks brighter than it otherwise would. Brightness is supposed to indicate how old a star is. Now that they know how deceptive brightness can be, astronomers have had to revise their estimates of star age. In line with observations from a satellite called the Wilkinson Microwave Anisotropy Probe, the universe now appears to be about 13.7 billion years old, astronomers say. That's quite a lot of time to ponder.—E. Sohn

Older Stars, New Age for the Universe
Older Stars, New Age for the Universe








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