why virus looks like robots or machines

Viruses are very smaller in size and can look very different from one another under a electron microscope. They have different shapes and sizes. Round shaped virus, Rod-shaped Virus, Brick shaped Virus, Threadlike Virus etc. Some viruses can even look like little robots with a head and a tail and little legs. Thus, the structure of virus under microscope looks like a standing robot with a head, body and legs.