Levi's taking a closer look at women's butts

The world faces many daunting challenges: climate change, ethnic conflict, economic disparity. Add to that the Herculean task of categorizing the world's many female butt types and matching them up with the right pair of jeans. Old Navy's Booty Reader made a stab at this by retrofitting facial-recognition technology to examine ass photos. Now, Levi's is introducing a "revolutionary custom-fit system" that involved taking 3-D images of 60,000 backsides to break down ladies' derrieres into three types: slight curve, demi curve and bold curve.