Most people also don't realize how slow the speed of light is in relation to the size of the universe and the distance between stars. It's quite easy for a per

Most people also don't realize how slow the speed of light is in relation to the size of the universe and the distance between stars. It's quite easy for a person to look at two galaxies in a telescope that will never be able to even observe each other's existence, let alone visit one another. People often argue that we'll find a way to travel faster than light -- which is curious given how rarely people argue that we'll find a way to travel backwards in time.