The Unseen Reality of Quarks

When I began many years ago as a research student, the graduate student working in science, we thought that matter was made up of protons and neutrons. As we experiment with this, began to find out more and more about what was going on, it became more and more difficult to understand things in those terms. And so then people had to see that though they couldn't see these entities on their own, there were the way matter behaved. All that made sense if these unseen quarks were sitting there inside. Never capable of being locked out, but nevertheless real. So in this indirect way, the unseen reality of quarks became an absolutely fundamental aspect of our understanding of the structure of