Scientists from the University of Leiden in the Netherlands have 3D printed the world's smallest Star Trek spaceship and a boat that acts as microswimmers.
Bats are known to hit smooth surfaces while flying because they could not see it. However, they also collide to walls even if they can detect it, but why?
Unlike rabbits and guinea pigs which are both considered prey and pets, goldfish have a special genome that left its past as food and became purely decoration.