
Since U.S. regulators approved them for medical use last year, implantable identification devices from VeriChip have turned up in some interesting places. The rice grain-sized chips, designed to be injected into the arm’s fatty tissue, can be scanned like a bar code to call up personal information such as name, blood type and medical records. The devices can also be linked to financial information such as credit card numbers and buying habits, which is why a nightclub in Glasgow, Scotland, recently began offering to implant its patrons with the chips.