Did Time Start at the Big Bang?
Season 5 Episode 27 | 12m 30s | Video has closed captioning.
A hundred years ago we discovered the beginning of the universe. Observations of the retreating galaxies by Edwin Hubble and Vesto Slipher, combined with Einstein’s then-brand-new general theory of relativity, revealed that our universe is expanding.
Problems Playing Video? | Closed Captioning