Why Is There So Much More Matter Than Antimatter?

Imagine you have two identical toys, one red and one blue. If they touch, they both vanish into thin air. The Big Bang was like a giant box where equal numbers of red and blue matter-toys were born. They should all have touched and vanished, leaving nothing but light.

But when you look around today, there are plenty of red toys (matter) left behind, and very few blue ones (antimatter). It is as if the blue toys decided to hide or disappear slightly faster than the red ones. Scientists call this baryon asymmetry.

If everything had vanished perfectly, we would be floating in a dark sea of energy with no stars, planets, or people. The tiny bit of extra matter that survived is what makes up the universe you see today. It is not magic; it is just a slight difference in how these tiny particles behave over time.

Think of it like a race between two runners who are almost identical. One runner trips just slightly more often than the other. In the end, that small difference means one runner finishes while the other lags behind. We are made of that finisher.