A cast of a Tyrannosaurus rex discovered in Montana greets visitors as they enter the Smithsonian Museum of Natural History in Washington, Tuesday, April 15, 2014. The original fossilized bones of ... more 
A cast of a Tyrannosaurus rex discovered in Montana greets visitors as they enter the Smithsonian Museum of Natural History in Washington, Tuesday, April 15, 2014. The original fossilized bones of this T. rex arrived at the museum today and will be reassembled for display. (AP Photo/J. Scott Applewhite) less 
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Associated Press | Photo By J. Scott Applewhite
Tue, Apr 15, 2014 1:00 PM EDT