In an initial experiment , researchers nicholas rule and nalini ambady from tufts university perused online dating sites and carefully selected 45 straight male faces and 45 gay male faces .
The home screen highlights a menu bar up top with categories like newsstand , books , music , docs and video , while an apple ( aapl ) cover flow-like " recency carousel , " displays all the apps , web sites , books and other content you 've perused in one fluid-scrolling row .