Physicists believe that they know very well about the structure of protons and neutrons. Is it really so? It appears that there are nearly twenty unsolved experimental results in this field, some of them exist nearly 80 years without explanation. This book discusses these mysteries in language understandable by many popular science readers. If you have a good understanding in scientific issues, then here you will find a unique opportunity to solve them... by yourself Eliyahu Comay is a theoretical physicist, born in 1932, who published scientific articles with predictions which were almost always against wall to wall consensus of the physicist community. All his predictions appeared to be correct to date. Among others, he predicted that the Higgs particle, Dirac monopoles, glueballs, SQM, pentaquarks, di-barions and the electric Aharanov-Bohm effect would not be found.