• AstroMarshburn/Twitter
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    Astronaut Thomas H. Marshburn tweeted this photo from aboard the International Space Station on Feb. 21 and wrote, "Cyclone Haurna is marching across the Mozambique Channel by Madagascar pic.twitter.com/3tt3uIf5yz"

  • AP Photo/Orlin Wagner
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    A Lawrence Firefighter places wheel blocks as he prepares to extinguish a vehicle fire in Lawrence, Kan., Thursday. The car caught on fire trying to make it up a snow covered hill.

  • AstroMarshburn
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    Thomas H. Marshburn uploaded this photo to Twitter on Feb. 21 and wrote, "The lights of Kuwait City on display for us the other night pic.twitter.com/1ddYsKiXcO"

  • AP Photo/Ted S. Warren
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    Snow covers the practice range before play resumes for the first round of the Match Play Championship golf tournament, Thursday, in Marana, Ariz. A snow storm blanketed the course on Wednesday suspending the first round of play.

  • Cmdr_Hadfield/Twitter
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    Chris Hadfield tweeted this photo from the International Space Station on Feb. 21, writing, "Cape Town, South Africa, the glinting sun highlighting the water. pic.twitter.com/IXvvIwmYII"

  • NASA Earth Observatory
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    After maintaining a low simmer for 10 months, Italy's Etna Volcano boiled over on Feb. 19 and 20, with three outbursts in 36 hours. NASA's Earth Observing-1 satellite captured this image of the eruption on Feb. 19, about 3 hours after the end of the first outburst. In this false-color image, fresh lava is bright red, snow is blue-green, and clouds are white. Forests and other vegetation appear green.

  • AP Photo/The Wichita Eagle, Jaime Greene
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    Tom McReynolds clears snow from a neighbor's house in Wichita, Kans.,Thursday.

  • Cmdr_Hadfield/Twitter
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    Commander of the International Space Station Chris Hadfield tweeted this photo on Feb. 21 and wrote, "These delicate cappuccino frosting decorations are, in fact, endless hummocks of Saharan sand. pic.twitter.com/Q17zBlhRTS"

  • NASA Earth Observatory
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    The condensation trails that form behind high-altitude aircraft, or contrails, are one of the most visible signs of the human impact on the atmosphere. On Feb. 15, NASA's Terra satellite captured this view of numerous contrails over Portugal and Spain.

  • ANTONIO SCORZA/AFP/Getty Images
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    Next: Today's 10 Must-See Photos: 2-20-2013

    A woman rides a stand up paddle board at Ipanema beach in Rio de Janeiro, Brazil on Feb. 21.