Listen up, this is how I see it
National Science Week! Here's one of the coolest things that we've seen in a long long time - a way to extract audio from only video. The way it works is that the video captures an object as it vibrates when audio hits it. An algorithm is then run to then convert these tiny vibrations back into audio, and although not perfect, provides a pretty decent representation of the original audio which was hitting the object.
From a puzzle point of view, think of the possibilities! You could listen in on a conversation in another building by pointing a camera at a vibrating object in their room! Or maybe talk to someone else when all you have access to is a CCTV feed of each other! The possibilities are endless...
Check out the video below: