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Cleaning Up Fish Farms
Silk’s superpowers
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Not Slippery When Wet
Tool Use Comes Naturally to Crows
Bee Disease
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Lost Sight, Found Sound
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Smelly Traps for Lampreys
A Butterfly's Electric Glow
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Small but WISE
It's a Small E-mail World After All
The solar system's biggest junkyard
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Hall of Dinos
The man who rocked biology to its core
Early Birds Ready to Rumble
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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
Earth
A Global Warming Flap
Ancient Heights
Farms sprout in cities
Environment
Bald Eagles Forever
Toxic Cleanups Get a Microbe Boost
A Change in Time
Finding the Past
A Plankhouse Past
Early Maya Writing
The Puzzle of Ancient Mariners
Fish
Megamouth Sharks
Skates and Rays
Mahi-Mahi
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Recipe for Health
Yummy bugs
Chew for Health
GSAT English Rules
Subject and Verb Agreement
Order of Adjectives
Who vs. That vs. Which
GSAT Exam Preparation Jamaica
42,000 students will sit for the GSAT Exam in two weeks
Mastering The GSAT Exam
Tarrant High overcoming the odds
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GSAT Practice Papers | GSAT Mathematics | Maths
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A Sweet Advance in Candy Packing
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Human Body
Cell Phones and Possible Health Hazards
Speedy Gene Gives Runners a Boost
Don't Eat That Sandwich!
Invertebrates
Horseshoe Crabs
Dust Mites
Jellyfish
Mammals
Rottweilers
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African Wildedbeest
Parents
How children learn
What Not to Say to Emerging Readers
Expert report highlights the importance to parents of reading to children!
Physics
Spin, Splat, and Scramble
Echoes of a Stretched Egg
Gaining a Swift Lift
Plants
White fuzzy mold not as friendly as it looks
Making the most of a meal
Tracking the Sun Improves Plant Pollen
Reptiles
Turtles
Copperhead Snakes
Sea Turtles
Space and Astronomy
Evidence of a Wet Mars
Pluto, plutoid: What's in a name?
No Fat Stars
Technology and Engineering
A Clean Getaway
Musclebots Take Some Steps
Weaving with Light
The Parts of Speech
Countable and Uncountable Nouns
Adjectives and Adverbs
Pronouns
Transportation
Revving Up Green Machines
Reach for the Sky
Flying the Hyper Skies
Weather
Arctic Melt
The Best Defense Is a Good Snow Fence
Polar Ice Feels the Heat
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Machine Copy

It would be a perfect theme for a horror movie: People build robots that can make copies of themselves. Robots reproduce like crazy. Robots take over the world. Ridiculous? In fact, only part of the story is fiction. Robots haven't yet taken over the world, but scientists from Cornell University have created simple machines that can make more of their own kind. The process is called self-replication. Far from being nightmarish, the researchers say, self-replicating robots could revolutionize space exploration. And they'd be perfect for clearing minefields and doing other risky tasks. Best of all, they'd be able to repair themselves. The new robots are made of stacks of blocks called "molecubes." Each cube is about the size of an adult's fist. Inside, there's a motor, electromagnets, and a tiny computer processor. The cubes are divided diagonally into plastic halves that can swivel back and forth. As a robot copies itself, computer programs tell the cube halves how to rotate. Electromagnets, meanwhile, let go of some cubes and pick up others that have been placed nearby. During the process, the stack of cubes twists and bends into various shapes, such as L's or upside-down U's. In the end, there are two identical objects, where once there was just one. This may not sound very impressive—yet. But it's a step on the path toward complex machines that can make copies of themselves.—E. Sohn

Machine Copy
Machine Copy








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