The Big Bang theory is like the ultimate cosmic fireworks show, but instead of colorful explosions, it unleashed the entire universe! Imagine, around 13.8 billion years ago, everything we know—time, space, matter—was compressed into an unimaginably tiny, hot, and dense point called a singularity. Then, boom! The Big Bang happened. It wasn't an explosion in space; it was an expansion of space itself. In a fraction of a second, the universe began rapidly expanding, and it continues to do so today. It's like inflating a balloon, but in this case, the balloon is the universe, and it's getting bigger and bigger.