ELI5: Explain Like I'm 5

Weakly interacting massive particles

So kiddo, have you ever heard of tiny things called particles? They are the building blocks of everything in the universe, including you, me, and everything around us. Some particles are very small, so small that we can't see them even with a microscope.

Scientists have found out that some particles are very weak and don't like to interact with other particles. They are called weakly interacting particles.

Now imagine that there are even bigger particles, so big that they don't fit inside an atom like electrons and protons do. They are called massive particles. Scientists think that there are some massive particles that are very weakly interacting too. And we call them weakly interacting massive particles, or WIMPs for short.

We don't know much about WIMPs, but scientists think they could be a type of dark matter. Dark matter is this invisible stuff that we think makes up a lot of the universe, but we can't see it, because it doesn't interact with light or any other type of electromagnetic radiation. So, scientists are trying to find WIMPs, because that could help us understand dark matter and what it does.

Some scientists are looking for WIMPs by using very sensitive detectors that can spot tiny differences in the behavior of atoms when a WIMP passes by. If they do find WIMPs, it could help us answer some really important questions about the universe.