This edible sensor could help keep food fresh


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.

The issue in an nutshell is that it’s a pain to manually test food that needs to stay at a certain temperature, but if you can monitor it constantly and wirelessly, you can save time and energy.

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…

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