Strongly interacting massive particle

Okay kiddo, let me tell you about something called a strongly interacting massive particle or SIMP for short.

First of all, let's talk about the smallest parts of matter that make up everything in the universe. These are called elementary particles and scientists have been studying them for a long time. However, there is one type of particle that is really hard to find and study because it doesn't interact with light or electromagnetic forces like other particles do.

That's where SIMPs come in. They are particles that are heavy and strong. They can interact with other particles through something called the strong nuclear force, which is the force that holds the nucleus of an atom together. Because they are so strong, they can't be easily broken apart or studied with regular experiments.

Scientists think that SIMPs could be a type of dark matter. Dark matter is something that makes up most of the matter in the universe but we can't see it because it doesn't emit or absorb light. It's like a secret ingredient in the universe that we know is there but can't see or touch.

So, a SIMP is a heavy and strong particle that doesn't interact with light or electromagnetic forces like other particles do. It can interact with other particles through the strong nuclear force and scientists think it could be a type of dark matter. Pretty cool, huh?