What are neutrino oscillations?

Neutrino oscillations are like when a toy car changes color as it zooms around the room.

Imagine you have three different colored toy cars, red, blue, and green, but they all look exactly the same from far away. When you watch them go by, sometimes it looks like the red one is going faster, and other times the blue one seems to be in front. But if you get close, you can tell they're all different colors.

Neutrinos are like these toy cars. They come in three types, electron neutrinos, muon neutrinos, and tau neutrinos, but they’re hard to tell apart when they’re moving quickly. As they travel through space, they seem to change from one type to another, just like how the toy car seems to switch colors as it zooms by.

This changing is called neutrino oscillations. Scientists discovered this by watching neutrinos come from far away, like the Sun or particle accelerators, and seeing that they didn’t always behave the same way when they arrived.

It’s a bit like getting a surprise gift, you think you're going to get a red toy car, but it turns out to be blue!