What Is Dark Matter?

We don't know what dark matter is, but scientists think it's a particle. particles are the basic building blocks of nature; they're like the smallest Lego brick that makes up reality. Astronomers have even seen these galaxy clusters like smashed together. And when this happened, like the dark matter just went straight through. That's what makes dark matter really hard to find. To solve it, we actually have to go to some of the deepest places of the earth.