Agriculture
Middle school science adventures
Microbes at the Gas Pump
Chicken Eggs as Drug Factories
Amphibians
Poison Dart Frogs
Tree Frogs
Frogs and Toads
Animals
A Fallout Feast for Crabs
Putting a Mouse on Pause
A Butterfly's New Green Glow
Behavior
The Smell of Trust
Brain cells take a break
Puberty gone wild
Birds
Swifts
Birds We Eat
Nightingales
Chemistry and Materials
Batteries built by Viruses
The Buzz about Caffeine
Cooking Up Superhard Diamonds
Computers
Electronic Paper Turns a Page
Earth from the inside out
Secrets of an Ancient Computer
Dinosaurs and Fossils
Did Dinosaurs Do Handstands?
From Mammoth to Modern Elephant
The bug that may have killed a dinosaur
E Learning Jamaica
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
Killer Space Rock Snuffed Out Ancient Life
Life under Ice
Surf Watch
Environment
Plant Gas
Nanosponges Soak Up Pollutants
Animal CSI or from Science Lab to Crime Lab
Finding the Past
Your inner Neandertal
Of Lice and Old Clothes
Watching deep-space fireworks
Fish
Puffer Fish
Whale Sharks
Codfish
Food and Nutrition
In Search of the Perfect French Fry
How Super Are Superfruits?
A Pepper Part that Burns Fat
GSAT English Rules
Finding Subjects and Verbs
Whoever vs. Whomever
Who vs. Whom
GSAT Exam Preparation Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
Ministry of Education Announces 82 GSAT Scholarships for 2010
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Scholarship
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Mathematics
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Math and our number sense: PassGSAT.com
How to Slice a Cake Fairly
Human Body
Gut Germs to the Rescue
Cell Phones and Possible Health Hazards
Electricity's Spark of Life
Invertebrates
Bees
Jellyfish
Hermit Crabs
Mammals
Oxen
Antelope
Chimpanzees
Parents
Children and Media
How children learn
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
IceCube Science
Invisibility Ring
The Pressure of Scuba Diving
Plants
Sweet, Sticky Science
Tracking the Sun Improves Plant Pollen
A Giant Flower's New Family
Reptiles
Turtles
Caimans
Komodo Dragons
Space and Astronomy
World of Three Suns
A Darker, Warmer Red Planet
A Star's Belt of Dust and Rocks
Technology and Engineering
Algae Motors
Searching for Alien Life
Roll-Up Computer Monitors to Go
The Parts of Speech
What is a Preposition?
Problems with Prepositions
What is a Verb?
Transportation
Are Propellers Fin-ished?
Middle school science adventures
Robots on the Road, Again
Weather
In Antarctica watch the heat (and your step)
Where rivers run uphill
Recipe for a Hurricane
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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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