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Marvin Bolt demonstrates a 19th Century telescope built in to a walking stick at his office at the Corning Museum of Glass in Corning, N.Y. in February 2015.  Bolt is on a world-wide quest to track down and catalog the oldest telescopes known to man, including those dating to the 1600s. (AP Photo/Carolyn Thompson)

Marvin Bolt demonstrates a 19th Century telescope built in to a walking stick at his office at the Corning Museum of Glass in Corning, N.Y. in February 2015. Bolt is on a world-wide quest to track down and catalog the oldest telescopes known to man, including those dating to the 1600s. (AP Photo/Carolyn Thompson)

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