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Tuesday, Nov 26, 2013 - 6:00 PM    "At The Edge of Space" NOVA takes viewers on an exploration of the Earth-space boundary zone that's home to some of nature's most puzzling and alluring phenomena: the shimmering aurora, streaking meteors and fleeting flashes that shoot upward from thunderclouds, known as sprites. Only discovered in 1989, sprites have eluded capture because they flicker into existence for a mere split-second - 40 times faster than an eye blink. G
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