Well I got a chance to give my last lecture yesterday (virtually of course) on 3D printing. I worked literally weeks to get everything ready and it went off (mostly) without a hitch. The world of 3D printing is full of vast, multifaceted, and divergent technologies with more applications than I could possibly list in a single lecture. In fact, they offer entire 12 week courses on 3D printing, so I had to cram everything together into a nice 1-2 hour presentation, where to start?!