At just 100-micrometers wide, this microscopic race car, created by researchers at the Vienna University of Technology, was built “using a nanoscale 3D printer; like a conventional 3D printer, resin is used to make shapes, but unlike a conventional 3D printer, the resin is hardened with a laser.” Continue reading for a video.

To make such super tiny objects, you have to use a super tiny laser beam, and tune it so that the only place were the resin can absorb two photons at once is in the exact center of the beam.