How Big Was the Big Bang?

第 1 季，第 4 集: Is it possible to calculate the size of the universe at the instant of the Big Bang? Assemble the clues that scientists use to address this question. In the process, discover a number of remarkable properties of the universe, including that it must be bigger that what we can see, extending beyond the boundary that limits our knowledge due to the finite speed of light and the age of the universe.