Aug 16 18:08:15 2011 <![endif]-->


 <div id="header-sub" class="clearfix">


          <div class="logo">
            <a href="http://www.time.com/time"><img src="http://img.timeinc.net/time/rd/trunk/www/web/feds/i/logo-time-horiz-white.png" height="37" width="120" alt="TIME" title="TIME" id="time-logo" /></a>

			<a href="http://www.time.com/time/science"><img src="http://img.timeinc.net/time/2011/graphics/headers/science.gif" height="65" width="248" alt="TIME.com Science" title="TIME.com Science" id="cha