Science Common Sense

1017 - What is the Big Bang theory?

The Big Bang theory is the idea that the universe began as a tiny point and expanded rapidly around 13.8 billion years ago. It's called the "Big Bang" because it was like a huge explosion that created all the matter and energy in the universe.

Imagine you have a big balloon. If you blow it up, it gets bigger, right? That's kind of what happened with the universe. It started small and then expanded really fast, and it's still growing today.

The Big Bang theory is supported by lots of scientific evidence, and most scientists believe it's the best explanation for how our universe began.