I'm trying to wrap my brain around the notion of tunneling and am hoping somebody could be of assistance. I'm wondering about the history of the idea, why was the notion of quantum tunneling first created? (What prompted the idea?) Also, I'd like to find experiments that have shown that quantum tunneling is the appropriate way to interpret what is happening rather than an intuitive approach that I keep hanging on to and can't shake. (I'm thinking that it could be based on various energies for the particles, like that of a Boltzmann distribution for gas particles. Then only the higher energy particles have enough energy to get through, etc.) So evidence that shows the correct path would be greatly appreciated.