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Endangered Horses Spotted in Valentine's NuzzlePrzewalski's horses are the only true wild horse left on Earth.
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Amazing Images: Heart Shapes in NatureSymbol of Valentine's Day seen around the world.
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Why Do Our Mouths Water?Extra copies of certain gene may make our mouths water more.
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Gorillas to Be Protected with New Congo National ParkPark protects large population of critically endangered western lowland gorilla.
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Georgia Tornado Signature Revealed in RadarTornado caused major damage and killed one person.
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Lightning Flash from Severe Storms Seen from SpaceFlash came from storms sweeping across eastern U.S.
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Cyclone's 'Overshooting Cloud Tops' Seen from AboveThe clouds punch into the stratosphere and indicated strong storms.
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Satellite Spies Severe Weather BrewingStorms could bring damaging winds, hail and even tornadoes.
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Britain Blanketed by Snow in New Satellite ImageA storm from the Atlantic and cold air from Scandinavia combined to create snow conditions.
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New Australian National Park Features Unique 'Horizontal Falls'These 'falls' are actually the rushing of the tides.
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Antarctic Plane Crash Killed All 3 Aboard, Searchers ConfirmAntarctica's fickle weather and remoteness often hamper rescue operations.
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Why are Frogs Disappearing?Kermit the Frog is more right now than ever: It's not easy being green.
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Night-Sensitive Satellite Spots Elusive CloudsSuomi NPP satellite sees mass of marine layer clouds.
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Chilling! Arctic Air Invasion Captured in AnimationFrigid air surges back and forth across the US.
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NASA Satellite Spies Quick Birth & Death of Tropical CycloneTropical Cyclone Oswald was spotted dumping rain on Australia.
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When Did April Fool's Day Begin?No one knows when or why the celebration of practical jokes and pranks began.
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What's the Most Popular Pet?The answer is less clear than you might have thought.
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What's the Deepest Canyon?Are you looking on Earth, or in the vast solar system?
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America's Newest National Park DeclaredAmerica's Newest National Park Declared
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What's Smog?Just what is in that brown, hazy layer of air around you?
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Tropical Cyclone Spotted Slamming Indian Ocean IslandsLa Reunion and Mauritius took a beating from the winds and rain.
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What is a Dry Thunderstorm?How can you get the lightning without the rain?
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What is a Carbon Sink?Natural carbon storage systems may be blocked by global warming.
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Bouncing Zoo Babies of 2012See what little bundles of joy were born at the world's zoos this year.
