The main evidence for the expansion of the universe is something called redshift. Redshift is the tendency for the light of far away objects to be composed of wavelengths at the red end of the spectrum.

The Hubble Constant

Sir Edwin Hubble was one of the first to suggest that the apparent red shift of stellar objects is caused by the doppler effect as the universe expands and the stars become further and further away.

February 17th

Diagram showing how gravitational time dilation can account for observed redshift

ainstream Science (SciPop) is an inductive rationalization of the premise that the universe doesn't require a divine or supernatural cause. All evidence of the supernatural has to be rationalized as something else.