Google or read books. Btw it is not true. It is a "theory ". The earth is created by God in seven days.

It's an American sitcom

It's an idea that the universe began as just a single dot, then expanded and stretched to grow as large as it is right now. Shorty, it's how astronomers explain the way the universe began.They say when the universe began it was just hot tiny particles mixed with light and energy. It wasn't like what we see right now.As everything expanded and took up more space, it cooled down. The tiny particles grouped together and they formed atoms. Then the atoms grouped together. Over lots of time the atoms came together to form stars and galaxies.The first stars created bigger atoms and group of atoms called molecules. That led to more stars being born. At the same time, galaxies were crashing and grouping together. As new stars were being born and dying, then things like asteroids,comets, planets,black holes formed.

I think google would be better than all of us for this.