String theory

String theory is a lot of fancy-sounding words, but it’s really just a way of describing things that’s so complicated that only a few very smart people understand it. Think of it like this: if you have a string, like a piece of yarn, and you pull on it, the yarn changes shape and it’s kind of like a net that catches different kinds of particles. In string theory, these particles and their interactions can be described using the same kind of net. Fun fact: string theory has been around since the 1980s but it’s still one of the most mysterious and complex theories in physics.