Tougher than you may think. BBCi – Science – Human Body – Spot The Fake Smile Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to email a link to a friend (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on LinkedIn (Opens in new window) Published by Christopher Null Christopher Null is a veteran technology journalist and the owner of Null Media, a custom blogging company. View all posts by Christopher Null