<p>A robot's appearance should depend on the work it does but never fall into the "uncanny valley" and come across as creepy</p><p>ByLarry Greenemeier</p><p>FACEOFF: Georgia Tech graduate student Akanksha Prakash studies older and younger people to better understand their preferences when it comes to a personal robot's appearance.Image: Courtesy of Georgia Institute of Technology</p><p>Showcasing more than fifty of the most provocative, original, and significant online essays from 2011, The Best Science Writing Online 2012 will change the way...</p><p><a href="http://www.scientificamerican.com/article.cfm?id=what-should-a-robot-look-like">Keep reading...</a></p>