Just #learned - there's 411 #photons in every cubic centimeter -
   a little smaller than a common die (regular dice) - now. Used to
   be more.
   [vine id = "hdPA6A2WFQW"]
   Just #learned - there's 411 #photons in every cubic centimeter -
   a little smaller than a common die (regular dice) - now. Used to
   be more.