Watching out for vultures
Earth-Friendly Fabrics
Cleaning Up Fish Farms
Tree Frogs
Salamanders and Newts
Red Apes in Danger
A Grim Future for Some Killer Whales
Sleep Affects a Bird's Singing
Primate Memory Showdown
Wake Up, Sleepy Gene
Fear Matters
Chemistry and Materials
Atom Hauler
The hungry blob at the edge of the universe
Cold, colder and coldest ice
Programming with Alice
Middle school science adventures
Small but WISE
Dinosaurs and Fossils
Dino Bite Leaves a Tooth
Some Dinos Dined on Grass
The Paleontologist and the Three Dinosaurs
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Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Hints of Life in Ancient Lava
Life trapped under a glacier
Meteorites may have sparked life on Earth
Easy Ways to Conserve Water
Ready, unplug, drive
Flu river
Finding the Past
Early Maya Writing
Decoding a Beverage Jar
Ancient Art on the Rocks
Nurse Sharks
Electric Eel
Food and Nutrition
Eat Out, Eat Smart
How Super Are Superfruits?
Allergies: From Bee Stings to Peanuts
GSAT English Rules
Capitalization Rules
Subject and Verb Agreement
Whoever vs. Whomever
GSAT Exam Preparation Jamaica
GSAT Scholarship
Preparing for the GSAT Exam
GSAT Exam Preparation
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Scholarship
GSAT stars reap scholarship glory
GSAT Mathematics
Math and our number sense:
Setting a Prime Number Record
Losing with Heads or Tails
Human Body
Prime Time for Broken Bones
Opening a Channel for Tasting Salt
Electricity's Spark of Life
Walking Sticks
Choosing a Preschool: What to Consider
How children learn
Children and Media
Road Bumps
Project Music
Einstein's Skateboard
A Change in Leaf Color
Underwater Jungles
Stalking Plants by Scent
Black Mamba
Sea Turtles
Space and Astronomy
A Whole Lot of Nothing
Intruder Alert: Sweeping Space for Dust
Melting Snow on Mars
Technology and Engineering
Searching for Alien Life
Musclebots Take Some Steps
Machine Copy
The Parts of Speech
Countable and Uncountable Nouns
Problems with Prepositions
What is a Preposition?
Are Propellers Fin-ished?
Middle school science adventures
Robots on the Road, Again
Earth's Poles in Peril
A Change in Climate
Catching Some Rays
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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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