Bits of bacterial DNA naturally lurk inside sweet potatoes
Long-ago hitchhiker comes from same genus used today to make genetically modified foods
![sweet potatoes](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/04/sm_sweetpotato_free.jpg?fit=860%2C460&ssl=1)
NATURALLY GMO Many kinds of cultivated sweet potatoes show the crop grew its own genetic engineering without human help.
Image courtesy of the International Potato Center (CIP)