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Courtesy of Neil deGrasse Tyson: What the dinosaurs ignored.

Courtesy of Neil deGrasse Tyson: What the dinosaurs ignored.

High-res Notes: 2 10/16/12 — 4:16pm Short URL: http://tmblr.co/ZMNfTyVQLHoE Filed under: #science  #asteroids  #awesome quotes  #neil degrasse tyson 
 
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