This video was first posted via a popular (now obsolete) Facebook science page called From Quarks To Quasars in December 2013. Watch all the 6 videos in this mini-series here:
   • From Quarks To Quasars  

Narration: Claudio Napoleoni (http://www.cnvoiceovers.ca/)

Audio: Chris Zabriskie - Is That You or Are You You