Welcome to WGBH's The Rewind, where each week we explore the public media archives where our history is preserved -- online and in the vault. Can YOU imagine how far 93 million miles is? Neither could audiences in the 1950s, so WGBH created an educational show to explain big scientific principles for the everyday earthling. In today’s clip, Professor Bart Bok explains the size of the universe.
Watch more episodes of WGBH's Of Science and Scientists series at https://americanarchive.org/ .
