ELI5: Explain Like I'm 5

Superfluid vacuum theory

Imagine if space was filled with a giant ocean. However, instead of water, this ocean was made up of tiny particles known as subatomic particles. These particles are so small that you can't see them with your eyes or even a microscope.

Now, when you walk in water, the water molecules around you move and create waves as you disturb them. This is just like how particles in space are being constantly disturbed by other particles floating about.

In a superfluid vacuum, however, these subatomic particles move in a very special way, almost like you are bobbing along in a pool of Jell-O. They move without any resistance, which means they never lose any of their energy.

The theory suggests that particles in the vacuum of space in the early universe were in a superfluid state, meaning they moved without any resistance. This movement, in turn, could have caused a lot of the phenomena that we observe today, such as dark energy and dark matter.

While this theory is still being studied and more research needs to be done before we can say anything for sure, it is an essential part of our understanding of the universe and how it came to be.