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National Geographic Traveler has scoured the globe for the world's most beautiful, interesting, and off-beat road trips. Dive in to get drive directions, quizzes, photos, and more.
Monday, November 9, 2009 |
Photo: "Alien" Atmosphere Helped Unfreeze Early EarthSome experts believe early Earth reached a threshold that caused the entire planet to stay covered in ice and snow. A January 2009 study says rocks from the Arctic are offering proof of an otherworldy atmosphere rich in carbon dioxide that might have helped melt millions of years' worth of deep freeze. Photograph by George F. Mobley/NGS
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAY50 Drives of a Lifetime
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