We know that there is a big bang 13.8 billion years ago. The huge bubble of matter exploded faster than the speed of light. Question is how that matter is formed?
According to Quantum mechanics, in a vaccum where there is no air as well as no matter. Our universe is just like it, completely blank like a vaccum. But according to this theory, there may be a quantum fluctuations in the vaccum means the particles which have negligible amount of mass which are known as virtual particles found in the first stage of universe. Empty space is not an empty space but full of these particles. In general, there is no such thing as empty in whole universe. These particles when also carry some amount of energy with them, when these particles are rushed in disorder they moved with infinitly speed and due friction releases emense amount of energy and matter.
Science Lover 