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 ...

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 ...

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 ...