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Why Was the Moore, Okla., Tornado So Severe?
Conditions above Moore were perfect for a violent vortex.
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The Tornado Damage Scale In Images
Tour the damage in this gallery.
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Famous Prime Number Conjecture One Step Closer to Proof
The puzzle has been around since the 1800s when a mathematician noticed a strange trend in prime ...
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Normal or Not? New Psychiatric Manual Stirs Controversy
Critics say the new DSM-5 will expand the boundaries of mental illness.
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Image of the Day
Amazing images every day!
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Maker Faire Bay Area 2013 (Photos)
From an enormous mousetrap and oversized tapigami flowers to kinetic tongue art, check out cool m...
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TOP STORIES
Surprising Pollution Problem: Too Many Trees (Op-Ed)
All-Natural 3D Printers: Salt and Wood Can Be Used
Sounds Of The Sea: Stones Clanging
Weird Pirate Ant Comes With an 'Eye Patch'
Did an Abandoned 'Ghost Ship' Disappear?
IMAGE ALBUMS
Image Gallery: Moore, Okla., Tornado Damage - May 2...
Gallery: Amazing Images Reveal Beauty in Science
Best Science Photos of the Week
Image Gallery: Cute and Colorful Frogs
IMAGE OF THE DAY
Deadly Storms
TOPICS
3D Printing
COUNTDOWNS
The 10 Weirdest Things Created By 3D Printing
INFOGRAPHICS
How Many People Have Died From Tornadoes? (Infographic)
WALLPAPERS
Glowing Green Blob | Space Wallpaper
Tech
3-D Printing Could Revolutionize U.S. Navy
The nascent technology could be put to good use on the high seas.
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The 7 Weirdest Things Made By 3D Printing
Army of Underwater Vehicles to Unravel Ocean Mysteries
Could Drones Revolutionize Agriculture?
Health
Antidepressants May Help With Heart Disease
Antidepressants may improve symptoms for some patients with heart disease.
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Normal or Not? When Grief and Depression Mingle
Oklahoma Tornado: How to Ease Children's Anxiety
More US Adults Getting Some Exercise
Planet Earth
How Moore Tornado Compares to Famous 1999 Twister
Tornadoes hit the same spot twice west of Moore, Okla.
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Storm Surveyors Hunt for Details of Deadly Moore Tornado
Moore, Okla. Tornado – FAQ
Location Data Reveals Our Changing Planet
Space
Extreme Solar Storm Could Cause Widespread Disr...
A large coronal mass ejection from the active sun could affect entire continents, scientists say.
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Sci-Fi Film 'After Earth' Presents Dark Future for Humanity
Mars Rover Opportunity Breaks US Record for Off-Planet Driving
Huge Asteroid to Fly Past Earth This Month
Strange News
Is Glass a Liquid at Room Temperature?
Or is it a solid with a low melting point?
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Navy Dolphin Finds Rare 130-Year-Old Torpedo
Was Girl Murdered for Her Organs?
'Dead' Man Walks Again ... But Why?
Animals
T. Rex's Smaller Cousin Ate Like a Falcon, Stud...
The Allosaurus used its neck and body to tug flesh from carcasses.
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On the Job: How Rescue Dogs Hunt for Tornado Survivors
Why Penguins Quit Flying
High Genes: Tibetan Antelope's Genome Sequenced
History
Ancient Human Innovations Linked to Climate Shifts
During wet periods, some of the first evidence of language appears.
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Cemetery Reveals Baby-Making Season in Ancient Egypt
Dogs and Humans Evolved Together, Study Suggests
Mysterious Minoans Were European, DNA Finds
Human Nature
Why Do Humans Have Palm Lines?
Palm lines, or palmar creases, can reveal more than you think.
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Therapy at Work? Bosses Say Yes
Coolest Science Stories of the Week
5 Salary Negotiation Mistakes to Avoid
Quizzes
Quiz: Electric Vs. Gas Vehicles
You've read about them. You've maybe even seen one on the road. But how much do you know about electri...
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Internet Quiz: Do You Know the Web?
Quiz: The Science of Electricity
This American (Tech) Life: A Quiz
Reference
3D Printing: What a 3D Printer Is and How It Works
3D printing will change the world. Learn about the science and technology that makes 3D printing work, how 3D printing is used and what the future holds.
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What is a ...
A prime number is an integer, or whole number, that can be div...
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Facts Abou...
Properties, sources and uses of the element strontium.
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2013 Atlan...
The complete list of hurricane names for the 2013 season.
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Facts Abou...
Properties, sources and uses of the element rubidium.
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Dowsing: T...
Using a divining rod, usually a forked twig, to find anything ...
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VIDEO
Oklahoma Tornadoes Seen From Space | Time-Lapse...
The NASA/NOAA GOES-13 satellite captured the midwest tornado outbreak. The time-lapse covers May 19th-20th, 2013. (Looped 3X)
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Oklahoma Tornado - 'This Is War ...
A huge tornado flattened an area near Oklahoma ...
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Dizzying View: World Trade Cente...
Hold onto your lunch! Watch construction worker...
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Solar Eclipse Seen Through Cloud...
The Coca Cola Space Science Center broadcasted ...
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Tiny Alien-Like Skeleton Contain...
Tests of the mysterious skeleton, believed by s...
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RAW VIDEO: Baby Gorilla Born at ...
'Momoko', a 29-year-old Western Lowland Gorilla...
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Two Alien Oceanic Earth-Like Pla...
A planetary system 1200 light years from Earth ...
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Beer's Taste Could Trigger Urge ...
Researchers at Indiana University are looking a...
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Explosions Near Finish Line of B...
Explosions struck the Boston Marathon as runner...
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Sim-Kidney Makes Real Urine | Video
Scientists at Massachusetts General Hospital ha...
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