Before a time I asked myself a qurstion: Part of the epidermis cells are dead right, so aren't the fishes(see link below) in spa dangerous to skin by eating a part of epidermis that bassicly protects derma from virus and infections? I'm just curious so tell me where I am wrong. https://www.goog...

Is it possible to send information to the brain without physically working with the nerves responsible for the same. For example, take the case of eyes. What I mean is if I somehow generate the data that the eyes generate and send to the optic nerves, is there some way already discovered or resea...