Computers are slowly gaining human senses. Cameras give them eyes, and microphones give them ears, however, one sense that hasn't yet been duplicated is a sense of smell. A company called C2Sense, however, is aiming to change that, and has come up with a small chip that essentially gives computers a sense of smell, which can be used to smell whether or not food is going off. While detecting spoiling food seems like it could be easy and not really that big of a deal, it's more important than what one might think. When a piece of fruit, for example, goes off, it releases a gas called ethylene. When fruits are exposed to this gas, they ripen much quicker, themselves releasing ethylene.