Sheldon's shirts do more than showcase his geeky interests; their colors reveal his emotional states, from the vibrant greens of happiness to the fiery reds of anger. But did you ever notice Sheldon's obsession with the number 73? This seemingly random favorite number is loaded with mathematical quirks and hidden show nods. Let’s explore these fascinating details and more as we delve into the background secrets of The Big Bang Theory — let’s watch the video...