This cool video was posted on YouTube by Minute Physics and a tip of the hat to Maria Popova for spotting it. It is a little more than four minutes long. It is both engaging and informative. Enjoy.
Cool Video: How Big is the Universe?
Reviewed by Marc Chandler
on
March 03, 2013
Rating:
Reviewed by Marc Chandler
on
March 03, 2013
Rating:
