Author: Jian Liu, Assistant Professor of Electrical Engineering and Computer Science, University of Tennessee

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Is it possible to make a phone through which we can smell, like we can hear and see? – Muneeba K., age 10, Pakistan Imagine this: You pick up your phone for a video call with a friend. Not only can you see their face and hear their voice, but you can also smell the cookies they just baked. It sounds like something out of a science fiction movie, but could it actually happen? I’m…