My questions are next: 1.What would happen if you try to travel with spacecraft exactly at the speed of light? Yes, I do know that when spacecraft trie to reach the speed of light its mass will increase immensely...,my question is what would happen to the spacecraft that is trying to achieve speed of light,beside its mass would immensely increase? 2.Do photons have mass at all? I've heard that only massless particles can travel at exactly the speed of light.And I also heard that photons,despite they don't have rest mass,have the mass of momentum or something like that-what does it mean? 3.Will humans ever reach faster-than-light(FTL) speeds with spacecrafts? Don't foget just for how many things humans have said that it would be impossible-like flight into the space was considered to be impossible! My question is also,does light travel at the same speed(300 000km/s) like in classic physics? I can't see anything going faster than light,since laws of the universe will not allow us,also no speed has been discovered that is faster than light?Since everything in the universe can't pass light speed,I can't see how is possible to travel faster than light-also how would an spacecraft survive faster than light trip??? 4.My question is does quantum physics allow to anything to travel faster than speed of light? 5.What are major differences between quantum physics and classic physics? 6.I've heard that energy,according to quantum physics exists only in quanta-small pockets of energy,which means energy is not continous-I honestly don't believe that energy can be created or destroyed in practice(in theory maybe),despite what some physicists say.Even if you had no matter,you would have vibrational energy,as well you have the vibrational energy of the absolute zero. Any opinions? 7.Quantum physics and zero-point energy-Has zero-point energy ever been proven? Is it possible to have free,unlimited energy from zero-point energy? Has zero-point energy ever been proven in practice(well,according to experiments of many,many inventors whose results were that they had energy from nothing,you know that there was some kind of zero-point energy)? From what I know there are a lot of inventors and inovators who actually created electricity from nothing(people like Thomas Henry Murray,Edwin Gray)),who ever of these inventors was close to the solution of our energy sources' problems was killed or dissapeared in mysterious circumstances. And also many inventors wanted to demonstrate to physicists,but physicits refused to give inventors any opportunity to prove their claims. Even physicists can make mistakes,that's why physics of today's world will eventually change,at least partially.