How Many Calories are on a Smudgy Screen?

Ho! Ho! Ho! Subscribe to Vsauce: http://bit.ly/POIaN7 http://www.Twitter.com/Tweetsauce http://www.Facebook.com/VsauceGaming http://www.YouTube.com/Vsauce2 http://www.YouTube.com/Vsauce3 How Stuff Works on Figerprints: http://science.howstuffworks.com/fingerprinting2.htm…