How many circus clowns can you fit into a Volkswagen Beetle? I'd bet good money that I could squeeze 10 clowns into one, as long as they were small and I had plenty of butter to grease the clowns up. (Editor's note: No clowns were harmed during the writing of this article.) Adding each additional clown would become more and more difficult, and predicting the theoretical limit of how many clowns could squeeze into the car would be extremely tough.

Obviou...