PHOTOS | Real-Life Men of Science Who Made 'One Giant Leap' into 'The Big Bang Theory'
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CBS
For as many shenanigans the gang gets into on The Big Bang Theory, we sometimes forget that they're among some of the most brilliant minds on the planet. So, it stands to reason that Sheldon (Jim Parsons), Leonard (Johnny Galecki), Howard (Simon Helberg), and Raj (Kunal Nayyar) would occasionally run into real-life scientists, astronauts, and tech moguls.
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