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    • Aches and Pains: You Can Thank Evolution for Them Charles Choi, LiveScience Contributor - LiveScience.com - Fri, Feb 15, 2013

      BOSTON — Bad backs, dangerous childbirths, sore feet and wisdom teeth pains are among the many ailments humans face from evolution, researchers say. More »Aches and Pains: You Can Thank Evolution for Them

      BOSTON — Bad backs, dangerous childbirths, sore feet and wisdom teeth pains are among the many ailments humans face from evolution, researchers say.

    • FILE - In this 1953 file photo, trees lie strewn across the Siberian countryside 45 years after a meteorite struck the Earth near Tunguska, Russia. The 1908 explosion is generally estimated to have been about 10 megatons; it leveled some 80 million trees for miles near the impact site. The meteor that streaked across the Russian sky Friday, Feb. 15, 2013, is estimated to be about 10 tons. It exploded with the power of an atomic bomb over the Ural Mountains, about 5,000 kilometers (3,000 miles) west of Tunguska. (AP Photo, File)
      2 space rocks hours apart point up the danger MARCIA DUNN - AP - Fri, Feb 15, 2013

      CAPE CANAVERAL, Fla. (AP) — A space rock even bigger than the meteor that exploded like an atom bomb over Russia could drop out of the sky unannounced at any time and … More »2 space rocks hours apart point up the danger

      FILE - In this 1953 file photo, trees lie strewn across the Siberian countryside 45 years after a meteorite struck the Earth near Tunguska, Russia. The 1908 explosion is generally estimated to have been about 10 megatons; it leveled some 80 million trees for miles near the impact site. The meteor that streaked across the Russian sky Friday, Feb. 15, 2013, is estimated to be about 10 tons. It exploded with the power of an atomic bomb over the Ural Mountains, about 5,000 kilometers (3,000 miles) west of Tunguska. (AP Photo, File)

      CAPE CANAVERAL, Fla. (AP) — A space rock even bigger than the meteor that exploded like an atom bomb over Russia could drop out of the sky unannounced at any time and wreak havoc on a city. And Hollywood to the contrary, there isn't much the world's scientists and generals can do about it.

    • NASA handout image of the passage of asteroid 2012 DA14 through the Earth-moon system
      In a rarity, a meteor hit and an asteroid near-miss on same day Irene Klotz - Reuters - Fri, Feb 15, 2013

      BOSTON (Reuters) - An asteroid half the size of a football field passed closer to Earth than any other known object of its size on Friday, the same day an unrelated and … More »In a rarity, a meteor hit and an asteroid near-miss on same day

      NASA handout image of the passage of asteroid 2012 DA14 through the Earth-moon system

      BOSTON (Reuters) - An asteroid half the size of a football field passed closer to Earth than any other known object of its size on Friday, the same day an unrelated and much smaller space rock blazed over central Russia, creating shock waves that shattered windows and injured 1,200 people. Asteroid 2012 DA14, discovered …

    • In this frame grab made from a video done with a dashboard camera, on a highway from Kostanai, Kazakhstan, to Chelyabinsk region, Russia, provided by Nasha Gazeta newspaper, on Friday, Feb. 15, 2013 a meteorite contrail is seen. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/Nasha gazeta, www.ng.kz)
      Meteor explodes over Russia, 1,100 injured JIM HEINTZ and VLADIMIR ISACHENKOV - AP - Fri, Feb 15, 2013

      MOSCOW (AP) — With a blinding flash and a booming shock wave, a meteor blazed across the western Siberian sky Friday and exploded with the force of 20 atomic bombs, injuring … More »Meteor explodes over Russia, 1,100 injured

      In this frame grab made from a video done with a dashboard camera, on a highway from Kostanai, Kazakhstan, to Chelyabinsk region, Russia, provided by Nasha Gazeta newspaper, on Friday, Feb. 15, 2013 a meteorite contrail is seen. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/Nasha gazeta, www.ng.kz)

      MOSCOW (AP) — With a blinding flash and a booming shock wave, a meteor blazed across the western Siberian sky Friday and exploded with the force of 20 atomic bombs, injuring more than 1,000 people as it blasted out windows and spread panic in a city of 1 million.

    • This image provided by NASA/JPL-Caltech shows a simulation of asteroid 2012 DA14 approaching from the south as it passes through the Earth-moon system on Friday, Feb. 15, 2013. The 150-foot object will pass within 17,000 miles of the Earth. NASA scientists insist there is absolutely no chance of a collision as it passes. (AP Photo/NASA/JPL-Caltech)
      Asteroid buzzes, misses Earth _ unlike meteor MARCIA DUNN - AP - Fri, Feb 15, 2013

      CAPE CANAVERAL, Fla. (AP) — A 150-foot asteroid hurtled through Earth's backyard Friday, coming within an incredible 17,150 miles and making the closest known flyby for … More »Asteroid buzzes, misses Earth _ unlike meteor

      This image provided by NASA/JPL-Caltech shows a simulation of asteroid 2012 DA14 approaching from the south as it passes through the Earth-moon system on Friday, Feb. 15, 2013. The 150-foot object will pass within 17,000 miles of the Earth. NASA scientists insist there is absolutely no chance of a collision as it passes. (AP Photo/NASA/JPL-Caltech)

      CAPE CANAVERAL, Fla. (AP) — A 150-foot asteroid hurtled through Earth's backyard Friday, coming within an incredible 17,150 miles and making the closest known flyby for a rock of its size. In a chilling coincidence, a meteor exploded above Russia just hours before the asteroid zoomed past the planet.

    • Record-Setting Asteroid Flyby: First Photos
      Record-Setting Asteroid Flyby: First Photos Mike Wall - SPACE.com - Fri, Feb 15, 2013

      An asteroid half the size of a football field gave Earth a historically close shave today (Feb. 15), and the first photos of the space rock encounter are starting to … More »Record-Setting Asteroid Flyby: First Photos

      Record-Setting Asteroid Flyby: First Photos

      An asteroid half the size of a football field gave Earth a historically close shave today (Feb. 15), and the first photos of the space rock encounter are starting to trickle in.

    • In this frame grab made from a video done with a dashboard camera, on a highway from Kostanai, Kazakhstan, to Chelyabinsk region, Russia, provided by Nasha Gazeta newspaper, on Friday, Feb. 15, 2013 a meteorite contrail is seen. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/Nasha gazeta, www.ng.kz)
      Fiery meteor explodes over Russia; 1,100 injured JIM HEINTZ and VLADIMIR ISACHENKOV - AP - Fri, Feb 15, 2013

      MOSCOW (AP) — With a blinding flash and a booming shock wave, a meteor blazed across the sky over Russia's Ural Mountains region Friday and exploded with the force of … More »Fiery meteor explodes over Russia; 1,100 injured

      In this frame grab made from a video done with a dashboard camera, on a highway from Kostanai, Kazakhstan, to Chelyabinsk region, Russia, provided by Nasha Gazeta newspaper, on Friday, Feb. 15, 2013 a meteorite contrail is seen. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/Nasha gazeta, www.ng.kz)

      MOSCOW (AP) — With a blinding flash and a booming shock wave, a meteor blazed across the sky over Russia's Ural Mountains region Friday and exploded with the force of an atomic bomb, injuring more than 1,000 people as it blasted out windows and spread panic in a city of 1 million.

    • In this photo provided by Chelyabinsk.ru a meteorite contrail is seen over Chelyabinsk on Friday, Feb. 15, 2013. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/Chelyabinsk.ru)
      Skyfall: Meteorites strike Earth every few months FRANK JORDANS - AP - Fri, Feb 15, 2013

      BERLIN (AP) — A meteor exploded in the sky above Russia's Ural Mountains on Friday, causing a shockwave that blew out countless windows and injured hundreds of people … More »Skyfall: Meteorites strike Earth every few months

      In this photo provided by Chelyabinsk.ru a meteorite contrail is seen over Chelyabinsk on Friday, Feb. 15, 2013. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/Chelyabinsk.ru)

      BERLIN (AP) — A meteor exploded in the sky above Russia's Ural Mountains on Friday, causing a shockwave that blew out countless windows and injured hundreds of people with flying glass. Here's a look at those objects in the sky:

    • Asteroid Buzzes Earth in Record-Breaking Flyby
      Asteroid Buzzes Earth in Record-Breaking Flyby Mike Wall - SPACE.com - Fri, Feb 15, 2013

      An asteroid half the size of a football field buzzed Earth in a historic flyby today (Feb. 15), barely missing our planet just hours after a much smaller object exploded … More »Asteroid Buzzes Earth in Record-Breaking Flyby

      Asteroid Buzzes Earth in Record-Breaking Flyby

      An asteroid half the size of a football field buzzed Earth in a historic flyby today (Feb. 15), barely missing our planet just hours after a much smaller object exploded above Russia, injuring perhaps 1,000 people.

    • Asteroid Buzzes Earth in Record-Setting Flyby
      Asteroid Buzzes Earth in Record-Setting Flyby Mike Wall - SPACE.com - Fri, Feb 15, 2013

      An asteroid half the size of a football field buzzed Earth in a historic flyby today (Feb. 15), barely missing our planet just hours after a much smaller object exploded … More »Asteroid Buzzes Earth in Record-Setting Flyby

      Asteroid Buzzes Earth in Record-Setting Flyby

      An asteroid half the size of a football field buzzed Earth in a historic flyby today (Feb. 15), barely missing our planet just hours after a much smaller object exploded above Russia, injuring perhaps 1,000 people.

    • In this photo provided by E1.ru a meteorite contrail is seen over a vilage of Bolshoe Sidelnikovo 50 km of Chelyabinsk on Friday, Feb. 15, 2013. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/ Nadezhda Luchinina, E1.ru)
      Meteor explodes over Russia; about 1,100 injured JIM HEINTZ and VLADIMIR ISACHENKOV - AP - Fri, Feb 15, 2013

      MOSCOW (AP) — A meteor streaked across the sky and exploded over Russia's Ural Mountains with the power of an atomic bomb Friday, its sonic blasts shattering countless … More »Meteor explodes over Russia; about 1,100 injured

      In this photo provided by E1.ru a meteorite contrail is seen over a vilage of Bolshoe Sidelnikovo 50 km of Chelyabinsk on Friday, Feb. 15, 2013. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/ Nadezhda Luchinina, E1.ru)

      MOSCOW (AP) — A meteor streaked across the sky and exploded over Russia's Ural Mountains with the power of an atomic bomb Friday, its sonic blasts shattering countless windows and injuring about 1,100 people.

    • Report: One in Five Reptiles at Risk of Extinction Sorcha Pollak - Time.com - Fri, Feb 15, 2013

      A new study by the Zoological Society of London has found that 19% — nearly one in five — of the world’s 10,000 species of reptiles are threatened with extinction. The … More »Report: One in Five Reptiles at Risk of Extinction

      A new study by the Zoological Society of London has found that 19% — nearly one in five — of the world’s 10,000 species of reptiles are threatened with extinction. The study, which has been printed in the journal Biological Conservation, was carried out by more than 200 experts who assessed the risk of extinction of 1,500 …

    • This image provided by NASA/JPL-Caltech shows a simulation of asteroid 2012 DA14 approaching from the south as it passes through the Earth-moon system on Friday, Feb. 15, 2013. The 150-foot object will pass within 17,000 miles of the Earth. NASA scientists insist there is absolutely no chance of a collision as it passes. (AP Photo/NASA/JPL-Caltech)
      Asteroid will buzz, miss Earth, unlike meteor MARCIA DUNN - AP - Fri, Feb 15, 2013

      CAPE CANAVERAL, Fla. (AP) — A 150-foot asteroid hurtled toward Earth's backyard, destined Friday to make the closest known flyby for a rock of its size. In a chilling … More »Asteroid will buzz, miss Earth, unlike meteor

      This image provided by NASA/JPL-Caltech shows a simulation of asteroid 2012 DA14 approaching from the south as it passes through the Earth-moon system on Friday, Feb. 15, 2013. The 150-foot object will pass within 17,000 miles of the Earth. NASA scientists insist there is absolutely no chance of a collision as it passes. (AP Photo/NASA/JPL-Caltech)

      CAPE CANAVERAL, Fla. (AP) — A 150-foot asteroid hurtled toward Earth's backyard, destined Friday to make the closest known flyby for a rock of its size. In a chilling coincidence, a meteor exploded above Russia's Ural Mountains just hours before the asteroid was due to zoom past the planet.

    • Today's Asteroid Flyby a Wakeup Call, Scientists Say
      Today's Asteroid Flyby a Wakeup Call, Scientists Say Mike Wall - SPACE.com - Fri, Feb 15, 2013

      Today's super-close asteroid flyby should be a wakeup call, spurring humanity to keep better track of the millions of space rocks whizzing through Earth's neighborhood, … More »Today's Asteroid Flyby a Wakeup Call, Scientists Say

      Today's Asteroid Flyby a Wakeup Call, Scientists Say

      Today's super-close asteroid flyby should be a wakeup call, spurring humanity to keep better track of the millions of space rocks whizzing through Earth's neighborhood, some scientists say.

    • In this frame grab made from a video done with a dashboard camera, on a highway from Kostanai, Kazakhstan, to Chelyabinsk region, Russia, provided by Nasha Gazeta newspaper, on Friday, Feb. 15, 2013 a meteorite contrail is seen. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/Nasha gazeta, www.ng.kz)
      Meteor explodes over Russia, nearly 1,000 injured JIM HEINTZ and VLADIMIR ISACHENKOV - AP - Fri, Feb 15, 2013

      MOSCOW (AP) — A meteor streaked across the sky and exploded over Russia's Ural Mountains with the power of an atomic bomb Friday, its sonic blasts shattering countless … More »Meteor explodes over Russia, nearly 1,000 injured

      In this frame grab made from a video done with a dashboard camera, on a highway from Kostanai, Kazakhstan, to Chelyabinsk region, Russia, provided by Nasha Gazeta newspaper, on Friday, Feb. 15, 2013 a meteorite contrail is seen. A meteor streaked across the sky of Russia’s Ural Mountains on Friday morning, causing sharp explosions and reportedly injuring around 100 people, including many hurt by broken glass. (AP Photo/Nasha gazeta, www.ng.kz)

      MOSCOW (AP) — A meteor streaked across the sky and exploded over Russia's Ural Mountains with the power of an atomic bomb Friday, its sonic blasts shattering countless windows and injuring nearly 1,000 people.

    • This image provided by NASA/JPL-Caltech shows a simulation of asteroid 2012 DA14 approaching from the south as it passes through the Earth-moon system on Friday, Feb. 15, 2013. The 150-foot object will pass within 17,000 miles of the Earth. NASA scientists insist there is absolutely no chance of a collision as it passes. (AP Photo/NASA/JPL-Caltech)
      Asteroid will buzz Earth, miss by 17,150 miles MARCIA DUNN - AP - Fri, Feb 15, 2013

      CAPE CANAVERAL, Fla. (AP) — A 150-foot asteroid hurtled toward Earth's backyard, destined Friday to make the closest known flyby for a rock of its size. More »Asteroid will buzz Earth, miss by 17,150 miles

      This image provided by NASA/JPL-Caltech shows a simulation of asteroid 2012 DA14 approaching from the south as it passes through the Earth-moon system on Friday, Feb. 15, 2013. The 150-foot object will pass within 17,000 miles of the Earth. NASA scientists insist there is absolutely no chance of a collision as it passes. (AP Photo/NASA/JPL-Caltech)

      CAPE CANAVERAL, Fla. (AP) — A 150-foot asteroid hurtled toward Earth's backyard, destined Friday to make the closest known flyby for a rock of its size.

    • Ancient asteroid strike in Australia "changed face of earth" Michael Sin - Reuters - Fri, Feb 15, 2013

      SYDNEY (Reuters) - A strike from a big asteroid more than 300 million years ago left a huge impact zone buried in Australia and changed the face of the earth, researchers … More »Ancient asteroid strike in Australia "changed face of earth"

      SYDNEY (Reuters) - A strike from a big asteroid more than 300 million years ago left a huge impact zone buried in Australia and changed the face of the earth, researchers said on Friday. "The dust and greenhouse gases released from the crater, the seismic shock and the initial fireball would have incinerated large parts …

    • Asteroid Gives Earth Record-Setting Close Shave Today: How to Watch Online
      Asteroid Gives Earth Record-Setting Close Shave Today: How to Watch Online Mike Wall - SPACE.com - Fri, Feb 15, 2013

      An asteroid half the size of a football field will buzz Earth today (Feb. 15) in a big way, coming closer to the planet than many satellites, and you can watch the cosmic … More »Asteroid Gives Earth Record-Setting Close Shave Today: How to Watch Online

      Asteroid Gives Earth Record-Setting Close Shave Today: How to Watch Online

      An asteroid half the size of a football field will buzz Earth today (Feb. 15) in a big way, coming closer to the planet than many satellites, and you can watch the cosmic encounter live online.

    • Tyrannosaurus at center of custody case going home to Mongolia Chris Francescani - Reuters - Thu, Feb 14, 2013

      NEW YORK (Reuters) - A nearly complete 70-million-year-old tyrannosaurus bataar skeleton will be returned to Mongolia following the high-profile prosecution of a Florida … More »Tyrannosaurus at center of custody case going home to Mongolia

      NEW YORK (Reuters) - A nearly complete 70-million-year-old tyrannosaurus bataar skeleton will be returned to Mongolia following the high-profile prosecution of a Florida paleontologist by federal authorities in New York, U.S. authorities said on Thursday. A New York federal judge ordered the skeleton and other fossils forfeited …

    • Love & Lust: 7 Lessons from the Animal Kingdom
      Love & Lust: 7 Lessons from the Animal Kingdom Wynne Parry, LiveScience Contributor - LiveScience.com - Thu, Feb 14, 2013

      NEW YORK — Sex. Many (but not all) animals do it. Partners come together to combine their genetic material in hopes of creating a healthy next generation for passing … More »Love & Lust: 7 Lessons from the Animal Kingdom

      Love & Lust: 7 Lessons from the Animal Kingdom

      NEW YORK — Sex. Many (but not all) animals do it. Partners come together to combine their genetic material in hopes of creating a healthy next generation for passing down their genes.

    • NASA Climate Scientist Arrested in Pipeline Protest
      NASA Climate Scientist Arrested in Pipeline Protest Jeanna Bryner, LiveScience Managing Editor - LiveScience.com - Thu, Feb 14, 2013

      Climate scientist James Hansen was arrested today outside the White House while protesting the proposed construction of the controversial Keystone XL Pipeline. More »NASA Climate Scientist Arrested in Pipeline Protest

      NASA Climate Scientist Arrested in Pipeline Protest

      Climate scientist James Hansen was arrested today outside the White House while protesting the proposed construction of the controversial Keystone XL Pipeline.

    • College Kids Get T. Rex Anatomy All Wrong
      College Kids Get T. Rex Anatomy All Wrong Megan Gannon, News Editor - LiveScience.com - Tue, Feb 12, 2013

      Even though Tyrannosaurus rex is arguably the most recognizable dinosaur, college students asked to draw the prehistoric beast tend to get it all wrong, researchers  … More »College Kids Get T. Rex Anatomy All Wrong

      College Kids Get T. Rex Anatomy All Wrong

      Even though Tyrannosaurus rex is arguably the most recognizable dinosaur, college students asked to draw the prehistoric beast tend to get it all wrong, researchers say.

    • What Would Happen if Asteroid 2012 DA14 Hit Earth?
      What Would Happen if Asteroid 2012 DA14 Hit Earth? Miriam Kramer - SPACE.com - Tue, Feb 12, 2013

      There is absolutely no chance that asteroid 2012 DA14 will hit Earth when it makes its closest approach on Friday (Feb. 15), but many other asteroids like it have made … More »What Would Happen if Asteroid 2012 DA14 Hit Earth?

      What Would Happen if Asteroid 2012 DA14 Hit Earth?

      There is absolutely no chance that asteroid 2012 DA14 will hit Earth when it makes its closest approach on Friday (Feb. 15), but many other asteroids like it have made a crash landing on the planet in the past.

    • Goo Lets Turtle Moms Pause Eggs' Growth
      Goo Lets Turtle Moms Pause Eggs' Growth Live Science Staff - LiveScience.com - Sun, Feb 10, 2013

      Pregnant turtles hit the pause button on their eggs' development until the time is just right to lay them in a nest, researchers say. The careful moms do this by producing … More »Goo Lets Turtle Moms Pause Eggs' Growth

      Goo Lets Turtle Moms Pause Eggs' Growth

      Pregnant turtles hit the pause button on their eggs' development until the time is just right to lay them in a nest, researchers say. The careful moms do this by producing a gooey substance in their reproductive tracts that cuts oxygen to the embryos, a study shows.

    • A NASA artist's concept of a broken-up asteroid
      Asteroid may have killed dinosaurs quicker than scientists thought Irene Klotz - Reuters - Fri, Feb 8, 2013

      CAPE CANAVERAL, Florida (Reuters) - Dinosaurs died off about 33,000 years after an asteroid hit the Earth, much sooner than scientists had believed, and the asteroid … More »Asteroid may have killed dinosaurs quicker than scientists thought

      A NASA artist's concept of a broken-up asteroid

      CAPE CANAVERAL, Florida (Reuters) - Dinosaurs died off about 33,000 years after an asteroid hit the Earth, much sooner than scientists had believed, and the asteroid may not have been the sole cause of extinction, according to a study released Thursday. Earth's climate may have been at a tipping point when a massive asteroid …