I somehow had never heard of cloud chambers before. With the help of condensing vapors at cool temperatures, you can see the actual paths of particles with your own eyes.

Not only can you see electrons, and protons, but you also see the interactions between particles. And cloud chambers have been used in physics since the 1920s, wild!
https://www.youtube.com/watch?v=oLobPAJuHBc
#physics #particlephysics #science