Why Is There More Matter Than Antimatter?

Imagine you have a bag of identical twins. One wears red (matter) and the other wears blue (antimatter). If they meet, they vanish in a puff of light. The universe should be full of vanished pairs, but instead, we are here made of red twins. This is because, long ago, for every billion pairs that vanished, one extra red twin survived. That one tiny leftover bit became everything you see today, from stars to people. Without this little mix-up, the universe would have been empty and dark.

The secret lies in how these particles behave differently over time. Scientists call this CP violation. It means matter and antimatter do not act like perfect mirror images. Sometimes matter decays slightly faster or slower than its twin. This small timing difference allowed a surplus of matter to win the survival game.

If there were no excess matter, the universe would just be radiation. We exist because of this imbalance. Every atom in your body is proof that antimatter lost the battle by a hair.