MENLO PARK, Calif., - A California startup analyzing food on a molecular level announced some hard news about one of the most beloved foods in the United States: 2 percent of hot dogs contain human DNA. Clear Food, the consumer guide wing of Menlo Park startup Clear Labs, said it analysed 345 hot dogs and sausages from 75 brands sold at 10 different retailers and discovered 14.4 percent of the products included ingredients that were not listed on the label. The startup said several of the tested brands had "hygienic" issues. "Hygienic issues occur when some sort of non-harmful contaminant...