The strings of string theory are unimaginably small. Your average string, if it exists, is about 10-33 centimeters long. That's a millionth of a billionth of a billionth of a billionth of a centimeter ...

String theory might be the theory of everything… or a flawed framework for theoretical physics. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Why strings? What are they made of? How did physicists even come up with this bizarre idea? And what’s all this nonsense of extra dimensions? PBS Space Time is available to stream on pbs.org and the ...