• Cmdr_Hadfield/Twitter
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    This photo of the Nile River and the Sinai Peninsula was tweeted by astronaut Chris Hadfield from the International Space Station on March 20. He wrote, "Tonight's Finale: The Nile and the Sinai, to Israel and beyond. One sweeping glance of human history. pic.twitter.com/nFjMp4lj14"

  • AuroraMAX/Twitter
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    This photo of the northern lights in Yellowknife, Canada, was tweeted by AuroraMAX on March 17. They wrote, "AURORAMAX GALLERY • Latest #photo of #aurora borealis above Yellowknife, NWT taken at 00:09 MDT on March 17, 2013. pic.twitter.com/tzWItOaBZj"

  • AstroMarshburn/Twitter
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    This picture of Chicago was tweeted by astronaut Thomas H. Marshburn from the International Space Station on March 21. He wrote, "During a break in yesterday’s work, looked out the window to find Chicago, IL just below us. pic.twitter.com/sXEdKJZb6Q"

  • AP Photo/Lionel Cironneau
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    A man swims in the Mediterranean sea on a sunny day in Nice, southeastern France, Thursday, March 21. The temperature outside is around 64 Fahrenheit and water 57 Fahrenheit.

  • AuroraMAX/Twitter
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    This photo of the northern lights at Yellowknife, Canada, was tweeted by AuroraMAX on March 17. They wrote, "AURORAMAX GALLERY • Latest #photo of #aurora borealis above Yellowknife, NWT taken at 00:09 MDT on March 17, 2013. pic.twitter.com/tzWItOaBZj"

  • AstroMarshburn/Twitter
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    This picture of Louisville, Ky., was tweeted by astronaut Thomas H. Marshburn from the International Space Station on March 21. He wrote, "Louisville, KY yesterday, just south of the snow line. Spring is almost here! pic.twitter.com/7gRiF8intu"

  • AP Photo/Anja Niedringhaus
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    Hundreds of Afghans wait to see the holy flag at the Kart-e Sakhi mosque in Kabul, Afghanistan, Thursday, March 21. Afghanistan celebrates Nowruz, marking the first day of spring and the beginning of the year on the Iranian calendar. 

  • Cmdr_Hadfield/Twitter
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    This photo of Shiraz, Iran, was tweeted by astronaut Chris Hadfield from the International Space Station on March 20. He wrote, "Shiraz, Iran - A city of culture and technology. The colourful roof choices complement the landscape well. pic.twitter.com/0ZFBle2jgY"

  • Cmdr_Hadfield/Twitter
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    This photo of the towns of Wiesbaden and Mainz in Germany was tweeted by astronaut Chris Hadfield on March 21. He wrote, "Liebes Deutschland! Die Fotos sind heute für Sie. Wiesbaden & Mainz, straddling the dark Rhine white snow and cloud. pic.twitter.com/vCfy5dZ7QF"

  • Cmdr_Hadfield/Twitter
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    Next: Yesterday's Must-See Photos

    This photo of Latakia, Syria, was tweeted by astronaut Chris Hadfield from the International Space Station on March 20. He wrote, "Latakia (and Tartus), where Syria meets the Mediterranean. Serving as an important port city for thousands of years. pic.twitter.com/ouUeGfu5dW"