The popular sitcom "The Big Bang Theory" has captured the hearts of millions of viewers worldwide. From its witty humor to its lovable characters, the show has become a cultural phenomenon. However, despite its popularity, there are several hidden details in the series that often go unnoticed by fans. In this article, we will explore 20 such hidden things in "The Big Bang Theory" that no one notices.

One of the hidden details in the show is the comic book store, which actually exists in real life. The store, called "Stuart's Comic Center," is located in LA and has been featured in several episodes of the show.

Another hidden detail lies in the character of Penny, who is portrayed as a struggling actress. In one episode, it is revealed that Penny has actually appeared in a low-budget horror film called "Serial Ape-ist 2: Monkey See, Monkey Kill.

Furthermore, the show often features subtle easter eggs related to popular culture. For example, in one episode, Sheldon can be seen wearing a t-shirt featuring the superhero Flash, which is a nod to the actor who portrays him in the series.

Additionally, the show pays homage to famous scientists through its characters' names. Sheldon Cooper, for instance, is named after physicist Sheldon Lee Glashow, while Leonard Hofstadter is named after Nobel laureate Robert Hofstadter.

Furthermore, there are hidden details in the set of the show as well. For instance, the whiteboards in Leonard and Sheldon's apartment often feature complex equations, some of which were actually written by renowned physicist David Saltzberg.

Moreover, the show often references real scientific theories and concepts. In one episode, Sheldon explains the quantum wave-particle duality, which refers to the concept that particles can behave both as waves and as discrete particles.

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