Electronic Tongues

I do this lab with my advanced biology class called “The Mystery Milk” lab. I give them 4 unknown liquids and they have to use a series of indicators to figure out what these milk-like products are. The students always ask me if they can taste the products (Answer: No, it’s a science lab). But imagine if there WAS a device that acted like a tongue for mystery liquids… Beer, Wine, Milk Scientists have used a combination of techniques to create electronic tongues (and noses). The tongue was able to identify wine from beer from milk. In fact, it was…