Soon, maybe within a year, Americans could be eating two new varieties of apple that won’t turn brown after slicing. To make these new transgenic apples, Okanagan Specialty Fruits, Inc., a Canadian company, turned to an advanced biotechnology called RNA interference (RNAi). Okanagan insists its modified Granny Smith and Golden Delicious varieties— called Arctic Golden and Arctic Granny — are safe to eat. “By the time Arctic apples reach your market, they will be one of the most researched and tested foods on the planet,” the company says on its website. Despite this assurance, a number of disturbing questions remain about how RNAi technology might affect human health.