Just because a food item may be frozen when you buy it, that doesn't mean it wasn't thawed and refrozen somewhere along the line. A new self-powered sensor, however, would change color to let you know ...

Researchers at the Istituto Italiano di Tecnologia in Italy have designed a food-grade device from edible materials that indicates whether a frozen product has been thawed and refrozen. The ...

When you're standing in the frozen food aisle, it's nearly impossible to know whether that Salisbury steak has thawed and refrozen -- a process with potentially harmful consequences. So, researchers ...