March 11, 2013 6:16 am Fingerprinting to Pay Express South Dakota School of Mines partners with Nexus to change the way students pay for their meals. The device uses biocryptology that locates points on the finger, up to seven layers deep, for identification. US & World Videos 3:29 Watch: Why the pay gap for women in tech hasn't budged 0:55 SF-based app tracks alcohol consumption 2:10 FCC votes to restore net neutrality 4:09 Watch: Students using AI service to write school papers 2:29 California lawmakers clear path for more oversight, traffic tickets for driverless cars