Heres a filter Instagram doesnt have: mid-19th century silver-plated daguerreotype. That was Robert Cornelius choice when he took what is believed to be the worlds first selfie, a self-portrait he snapped one day in October 1839 while standing in the yard behind his familys lamp store in Philadelphia. Of course, snapped, is a relative term, as the Library of Congress estimates young Cornelius had to hold this position for somewhere between three and 15 minutes, depending on the amount of light in his backyard during the exposure. …