The redshift seen in the light from far away stars has been offered as evidence to support the Big Bang theory. But what is the Big Bang theory? Check out

this video to learn more. For each milestone, put in context the time from the Big Bang (t=0). 3A) The first nuclei (H and He) form at about t = 5 3B) The first atoms form at about t = 400 3D) The Sun forms at about t = 9.1 3E) We are born at about t = 13.77