The unbelievable story behind the ‘most terrifying’ image NASA has ever taken of astronaut Bruce McCandless II who did the first-ever untethered spacewalk.
Camp Century was built to store nukes beneath Greenland's ice. See photos of the underground, "Star Wars"-like site.
Lots of us look up at the night sky with wonderment, asking how humans are able to explore the universe. Tracy Drain, a ...
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