[youtube https://www.youtube.com/watch?v=EC0Xfv433n8?feature=oembed&enablejsapi=1&origin=http://safe.txmblr.com&wmode=opaque&w=250&h=141] Just in case Jon Stewart forgot he was aging, a new YouTube video is showcasing it for posterity. From black hair to gray.. as Stewart leaves the DAILY SHOW, times have certainly changed. As has Jon Stewart’s appearance.