Microscopic camera could be injected into your body
 

You may have seen some very small cameras in your day, but nothing like this. University of Stuttgart scientist have developed a 3D-printed, three-lens camera that's just 100 micrometers (0.004 inches) across. That's small enough that you could injec...

https://www.engadget.com/2016/06/28/...ctable-camera/