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Why Italy's Earthquake Was WeirdThis area hadn't seen a strong quake in centuries.
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Elusive 'Asian Unicorn' Faces ExtinctionThese secretive creatures were discovered only 20 years ago.
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Hot Summer Projected for Much of USNo relief in sight for drought-stricken areas of the country.
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Newly Discovered Seafloor 'Chimneys' Teem With LifeOne chimney is as tall as a seven-story building.
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First Images of Antarctic Volcano's Innards RevealedVolcano's own gas bubbles reveal underground plumbing.
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Antarctica from Above: Watch the Birth of an IcebergNASA scientists captured stunning footage during flights over the ice.
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Rare Twin Waterspouts Caught on CameraOne twister moved over land and caused damage.
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How on Earth? The Science Behind Earthquake WarningsAuthorities can sound the alarm seconds to minutes before shaking strikes.
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The Surprising Threat from Mexico's Awakened VolcanoIt's not just lava that poses danger from volcanoes.
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Italian Volcano Erupts for 7th Time This YearFamed Mount Etna took its time before its most recent lava explosion.
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Mysterious Balancing Rocks Resist Quakes' ShakesThese rocks near the San Andreas Fault aren't feeling earthquakes for some reason.
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Ancient 'Wave of Poseidon' Was Real TsunamiThe wave saved a town 1,500 years ago, but tsunamis pose a real danger now.
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Humans Behind Strongest Oklahoma Quake Ever Recorded, Research SuggestsIndustrial practice may have some dramatic consequences.
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Emperor Penguin Numbers Double Previous Estimates, Satellites ShowThe iconic birds are facing threats as Antarctic ice melts.
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Cameron's Dive Stirs Push for Future Deep-Sea ExplorationScientists hope Cameron's vehicle will spark a new age of research and exploration.
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Watch Live: Robot Sends Back Footage of Deep-Sea SightsTake a trip to a spot no humans have ever seen (and never leave home).
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Why Today's Indonesia Quake Didn't Make a Monster TsunamiThis was a different kind of quake.
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Deep-Sea Expedition Reveals Stunning Sea Life, DamageUnexplored canyons captured in HD footage.
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What's Under Antarctica? Quake Waves Give First LookScientists finally have long-hidden data from one of Earth's last unmapped places.
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Storm Chaser Catches Terrifying Dallas TornadoesThese guys run right toward the danger.
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Mount Etna Erupts in Fiery GloryPhotos of the restive mountain reveal a spectacular show.
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Fooled You! Richard Branson's Volcano Journey PrankVirgin Volcanic announced its plans on April 1.
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Washington Monument Surveyed for Quake EffectsThe time-tested technique, combined with modern technology, produces incredibly accurate data.
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Leaf Peeper Paradise: Autumn's Best ColorsFrom Maine to Texas, fall's leaves impress.
