What’s the smallest thing in the universe? – By Jonathan Butterworth

https://ed.ted.com/lessons/the-standard-model-of-particle-physics-jonathan-butterworth

This is a very densely packed lesson on subatomic particles and forces and the so-called ‘standard model’. When we were kids, there were just neutrons, protons and electrons. I wonder what physicists will say about our current understanding of subatomic particles thirty years from now.