[AndrewC]

He came up with his theory to explain why mass disappears as matter is broken down to its smallest constituent parts

Isn't that because they are getting smaller? After all, we now think that the neutrino has mass.

[Ken H]

He came up with his theory to explain why mass disappears as matter is broken down to its smallest constituent parts

Isn't that because they are getting smaller? After all, we now think that the neutrino has mass.

If you break it down further, you do get the "Duran Particle" - which has no mas.