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On the Trail of America's Next Top Scientists
Vitamin D-licious Mushrooms
Watering the Air
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Little Bits of Trouble
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Untangling Human Origins
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A Jellyfish's Blurry View
Puffer Fish
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Allergies: From Bee Stings to Peanuts
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GSAT English Rules
Who vs. That vs. Which
Finding Subjects and Verbs
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Mastering The GSAT Exam
10 Common Mistakes When Preparing for the GSAT Math Test
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
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GSAT Exam Preparation
Access denied - Disabled boy aces GSAT
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Math of the World
How to Slice a Cake Fairly
Human Body
Hey batter, wake up!
Football Scrapes and Nasty Infections
Nature's Medicines
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Choosing a Preschool: What to Consider
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Extra Strings for New Sounds
The Mirror Universe of Antimatter
Thinner Air, Less Splatter
Plants
Springing forward
A Change in Leaf Color
Bright Blooms That Glow
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Ready, Set, Supernova
Cousin Earth
Planet Hunters Nab Three More
Technology and Engineering
A Clean Getaway
Toy Challenge
Slip Sliming Away
The Parts of Speech
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What is a Preposition?
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Transportation
Seen on the Science Fair Scene
How to Fly Like a Bat
Middle school science adventures
Weather
Arctic Melt
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Watering the Air
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Hot Summers, Wild Fires

A wood fire can be handy when you're camping. You can roast marshmallows or stay warm, for example. Forest fires that rage out of control, however, are a big problem. Wildfires cause hundreds of millions of dollars in damage every year. And the amount of destruction has grown over the last 2 decades, especially in the western United StatesTo understand better why the northern Rocky Mountains region has been hit especially hard by wildfires, scientists from the University of Arizona in Tucson looked at weather, snow, and fire records from 1970 to 2003. Their study showed that, between 1987 and 2003, fires burned an area 6.5 times larger than the area burned between 1970 and 1986. The fire season also started earlier, and its average length increased by 78 days. Warmer spring and summer temperatures appear to be part of the explanation for this change. The average temperature in the study's more recent period was 0.87C higher than it was in the earlier period. And this trend is likely to continue. Experts predict that average summer temperatures may rise between 2C and 5C by the year 2050 in western North America. The timing of snowmelt appears to be another cause of the fire boom. When snow melts early in the season, forests become drier through the summer and catch fire and burn more easily. Western snow packs now typically melt a week to a month earlier than they did 50 years ago, according to recent studies. Some people have blamed the growing fire risk on policies that allow brush and branches to build up on forest floors. But clearing brush by itself won't help much if changes in climate are largely responsible for increasingly severe forest fires.E. Sohn

Hot Summers, Wild Fires
Hot Summers, Wild Fires








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