Sheldon has a dark matter model that uses a theoretical particle called the Cooper Boson.
Sheldon finds the work they are doing surprisingly engaging. Sheldon claims that he is in his office; however, Amy is outside it having brought him dinner since he was working late.
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They has spent the night though Raj didn't sleep because he didn't want to snore.
Stuart is happy for Raj, but he knows that Raj is going to screw it up, so Raj ends up talking to Penny.
She also doesn't believe that Raj can handle a casual relationship. Penny tells him that every time he starts to plan their wedding, he should stab himself with a fork.
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