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Chicken Eggs as Drug Factories
Fast-flying fungal spores
Poison Dart Frogs
Salamanders and Newts
Insects Take a Breather
Mating Slows Down Prairie Dogs
Polar Bears in Trouble
Sugar-pill medicine
The Snappy Lingo of Instant Messages
Listen and Learn
Chemistry and Materials
Hitting the redo button on evolution
Unscrambling a Gem of a Mystery
Putting the Squeeze on Toothpaste
Games with a Purpose
Batteries built by Viruses
Music of the Future
Dinosaurs and Fossils
From Mammoth to Modern Elephant
Early Birds Ready to Rumble
Teeny Skull Reveals Ancient Ancestor
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What is groundwater
A Grim Future for Some Killer Whales
Digging into a Tsunami Disaster
The Wolf and the Cow
When Fungi and Algae Marry
Hazy with a Chance of Sunshine
Finding the Past
Digging Up Stone Age Art
Settling the Americas
Big Woman of the Distant Past
Puffer Fish
Whale Sharks
Food and Nutrition
Recipe for Health
In Search of the Perfect French Fry
The mercury in that tuna
GSAT English Rules
Whoever vs. Whomever
Subject and Verb Agreement
Who vs. Whom
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
How are students placed after passing the GSAT exam
2014 GSAT Results for Jamaican Kids
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GSAT Mathematics
Losing with Heads or Tails
Detecting True Art
Setting a Prime Number Record
Human Body
Electricity's Spark of Life
Running with Sneaker Science
Heavy Sleep
Horseshoe Crabs
African Hippopotamus
How children learn
Choosing a Preschool: What to Consider
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Strange Universe: The Stuff of Darkness
Road Bumps
Einstein's Skateboard
When Fungi and Algae Marry
A Giant Flower's New Family
City Trees Beat Country Trees
Boa Constrictors
Space and Astronomy
A Puffy Planetary Puzzle
A Star's Belt of Dust and Rocks
Killers from Outer Space
Technology and Engineering
Roll-Up Computer Monitors to Go
Dancing with Robots
Crime Lab
The Parts of Speech
What is a Verb?
What is a Noun
Where rivers run uphill
Robots on a Rocky Road
Charged cars that would charge
Earth's Poles in Peril
Watering the Air
In Antarctica watch the heat (and your step)
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Weekend Weather Really Is Different

Do you ever feel like the weather is out to get you? All week long, it seems, you sit inside at school while the sun shines outside. Then, as soon as the weekend comes, the sky turns gray. There's rain in the forecast. In some ways, you may be right. Weekend weather differs from weekday weather in certain places, say researchers who studied more than 40 years of weather data from around the world. They focused on temperature differences between daytime highs and nighttime lows. This difference measurement is called the diurnal temperature range, or DTR. Part of the study involved 660 weather stations in the continental United States. At more than 230 of these sites, the average DTR for Saturday, Sunday, and Monday was different from the average DTR for Wednesday, Thursday, and Friday, the researchers found. The difference was small—only several tenths of a Celsius degree—but the pattern was striking enough to make the scientists take notice. In the southwestern U.S., temperature ranges were typically broader on weekends. In the Midwest, weekdays saw larger daily temperature variations. This sort of weekly rise and fall doesn't line up with any natural cycles, the researchers say. Instead, they blame human activities, possibly air pollution from those activities, for these weather effects. For example, tiny particles in the air could affect the amount of cloud cover, which would in turn affect daily temperatures. So, tiny windborne particles from California, generated on weekdays, might first affect weather close to home in the southwest, then later influence midwestern weather. It looks like your weekend weather has a lot do with which way the wind blows and where it comes from.—E. Sohn

Weekend Weather Really Is Different
Weekend Weather Really Is Different

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