It is said, that in the beginning the universe was a singularity and then it exploded. A picoseconds or so after the explosion it was a fiery ball trillions of degrees in temperature and containing pure radiation. as it expanded it cooled down until quarks and then barons and other particles formed. so as it cooled the particles condensed out of the radiation soup. So, can we say then that matter particles are frozen bits of radiation or energy or what ever it was?