Making sure fresh food is kept at the right temperature during transit is a harder problem than one might think — but the Swiss are on the job. Not only did they create robo-fruit to mix in with the real ones, but another research team has created a biodegradable temperature sensor that sticks to food all the way from its starting point to the inside of your mouth.
You can do that right now, in a way, with RFID tags and so on — but those tags use metals that aren’t recommended for eating, and may even be poisonous. The solution arrived at by Giovanni Salvatore, a researcher at ETH Zurich, is to make an ultra-thin sensor out of materials that a human can digest safely.
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