Scientist 3D printed a Star Trek USS Voyager spaceship that is smaller than the width of a human hair.

Scientists at Leiden University in the Netherlands have created a 3D-printed version of Star Trek's USS Voyager spaceship that measures a ultra-tiny 15 um (micrometers) long. By comparison, the width of a human hair is 50 um. The USS Voyager spaceship is so tiny, it can only be viewed through a microscope! Microswimmers Scientists create microscopic models so they can study "microswimmers". Microswimmers are important because they will one day lead to tiny swimming robots that can be turned loose in the human body to repair tiny injuries or deliver drugs to a precise location inside the body. Because they are so tiny, microswimmers face a variety of challenges that scientists must solve. For instance, their small size and shape means they are impacted by the fluid's viscosity