Growing Healthier Tomato Plants
Cleaning Up Fish Farms
Keeping Bugs Away from Food
Salamanders and Newts
Deep Krill
Sleepless at Sea
Eyes on the Depths
Diving, Rolling, and Floating, Alligator Style
Wired for Math
Fear Matters
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Spinning Clay into Cotton
Heaviest named element is official
A Light Delay
Small but WISE
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Troubles with Hubble
Dinosaurs and Fossils
Dino Flesh from Fossil Bone
South America's sticky tar pits
A Living Fossil
E Learning Jamaica
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The Wolf and the Cow
Antarctica warms, which threatens penguins
Missing Tigers in India
Finding the Past
Childhood's Long History
Ancient Cave Behavior
The Taming of the Cat
Flashlight Fishes
Megamouth Sharks
Food and Nutrition
A Pepper Part that Burns Fat
Sponges' secret weapon
Healing Honey
GSAT English Rules
Problems with Prepositions
Finding Subjects and Verbs
GSAT Exam Preparation Jamaica
GSAT Exam Preparation
2014 GSAT Results for Jamaican Kids
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GSAT Exams Jamaica Scholarships
GSAT Scholarship
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Cell Phones and Possible Health Hazards
Remembering Facts and Feelings
African Wild Dog
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What Not to Say to Emerging Readers
The Mirror Universe of Antimatter
Thinner Air, Less Splatter
One ring around them all
Hungry bug seeks hot meal
Tracking the Sun Improves Plant Pollen
Springing forward
Copperhead Snakes
Snapping Turtles
Space and Astronomy
Cool as a Jupiter
Asteroid Moons
Slip-sliding away
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Young Scientists Take Flight
Weaving with Light
Musclebots Take Some Steps
The Parts of Speech
What is a Preposition?
Problems with Prepositions
Where rivers run uphill
Flying the Hyper Skies
Middle school science adventures
Antarctica warms, which threatens penguins
Where rivers run uphill
In Antarctica watch the heat (and your step)
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Digging for Ancient DNA

In the movie Jurassic Park, scientists discover fossilized insects that had eaten dinosaur blood just before they died. The dino blood is full of DNA—the instruction manual of life—and the scientists use some of those tiny molecules to bring dinosaurs back to life. One of the reasons this could never really happen is that DNA is incredibly fragile. Every speck of dino DNA has probably broken down during the 65 million years since the giant reptiles disappeared. But now, new DNA discoveries are opening windows into ancient worlds. In tiny samples of soil from New Zealand and Siberia, molecular biologist Eske Willerslev of the University of Copenhagen and his colleagues have found the oldest bits of identifiable DNA ever. In Siberia, the researchers drilled into ice and dirt dating back 2 million years. In sediment that was 30,000 years old, they found DNA from eight animal species, including horses, reindeer, bison, and woolly mammoths. In DNA extracted from 400,000-year-old soil, the researchers found at least 28 species of trees, shrubs, herbs, and mosses. Willerslev guesses that the DNA made its way into the soil through animal poop. He hopes the new findings will help reveal what life was like long ago. Unfortunately, the chances of any DNA in dinosaur poop lasting that long are pretty slim.—E. Sohn

Digging for Ancient DNA
Digging for Ancient DNA

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