Ekpyrotic universe

Imagine a big, big universe that has existed for a really, really long time. Scientists have been trying to understand how the universe began and how it works. Some scientists believe in a theory called the ekpyrotic universe.

The ekpyrotic universe is like a big game. It's a game where two universes play against each other. One universe is called the "brane" and the other is called the "bulk." These two universes are always colliding with each other and making a really big noise, like a big "bang!"

When the collision happens, the energy from both universes gets mixed up and creates lots of particles. These particles start to travel and form matter. Eventually, these particles and matter could form stars, galaxies, and even planets just like the one we live on today.

So, the ekpyrotic universe theory says that our universe started with a big collision between two universes. This is different from other theories that say our universe started with just one big bang.

Scientists are still studying the ekpyrotic universe theory to see if it's true. They use special machines and telescopes to learn more about the universe and how it works. It's a big mystery, but scientists are working hard to figure it all out!