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Six decades ago, human spaceflight was a two-sided coin, as the United States and Soviet Russia competed for primacy in the Space Race during the Cold War. With global nuclear holocaust looming menaci

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CHINA’S GROWING PRESENCE IN THE ARCTIC IS INFLAMING TENSIONS WITH THE US

THE MOST DOMINANT FORCE IN THE UNIVERSE IS ALSO ITS MOST MYSTERIOUS AND MOST UNANTICIPATED

Were the seeds of Civil War already written into the American Constitution?

The land Down Under seems ready-made for soul-stirring adventures. Its 16,000 miles of coastline are one long playground, with vertiginous cliffs riddled with hiking trails and reefs ripe for diving. There’s ancient flora and unique wildlife hiding in the rainforests, and cities that offer every activity under the sun. So pick up your hiking boots, paddle or flippers and get outdoors