gp you are right. Einstein got so involved on founding the Theory For Everything on his late years, he didnt even care to learn about Strong and Weak Nuclear Forces, infact he didnt not even know enough abt these forces. There is a theory called string theory right now, it is so radical in every perspective, it says there exists a substance called graviton(which is not yet discovered) which leaks to other layers creating the force less stronger than Electromagnetic Force. gp ko reply dekhera hattar ma reply gareko :P continuation pachi :P