Which statements are true regarding the scientific evidence supporting the big bang theory? researchers found cosmic microwave background radiation, which is a heat imprint left over from the big bang. quasars have been observed exploding and expanding from a single, hot, dense singularity. a primordial form of helium gas was found by the endeavor space shuttle. a redshift of light emitted by stars and galaxies indicates the universe is expanding. redshift and blueshift of light emitted by stars and galaxies indicate that universe is expanding and contracting.