Two years ago, artist Heather Dewey-Hagborg caused a stir in both the art and biosecurity worlds when she displayed busts of people she’d never met. She determined the facial features for her “Stranger Visions” show using DNA found in the streets and subways of New York City. “We are shedding our biological information all the time without knowing it,” Dewey-Hagborg says. “I think anonymity should be a choice.” She devised her next project with that thought in mind. The pair of perfume-like sprays she invented, called Invisible, obscures DNA traces so no one can follow your genetic trail.