Physicists 3D Print a Boat Small Enough to Fit Inside a Human Hair

Because our scientists were so preoccupied with whether they could that they didn’t stop to think if they should, physicists at Leiden University have 3D printed a tiny tugboat only 30-microns in length. For reference, an average human hair is about 90-microns in width, although mine is much thicker because I shampoo with a product specifically formulated for bears.