Eye Spy, Playing with Perception

1. 
   Fake or Real?
   Though a sonic boom is not visible, sometimes the drop in pressure caused by a plane breaking the sound barrier will cause moisture in the air to suddenly condense into a conical cloud. ~ John Gay, 2001 http://bit.ly/cSnHYA:

   Real

   Though a sonic boom is not visible, sometimes the drop in pressure caused by a plane breaking the sound barrier will cause moisture in the air to suddenly condense into a conical cloud. ~ John Gay, 2001 http://bit.ly/cSnHYA:

   Real

A Peabody Essex Museum website in support of the Eye Spy, Playing with Perception exhibition    

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