An International Space Station astronaut had problems to communicate with his family on Earth ahead of Christmas, only because he misdialed. He asked the question we use as our title, and the person at the other end of the line, who probably didn’t know she was getting a call from extraterrestrial space, merely answered: “Wrong number.” It is perhaps an understatement to say that the telephone has become at least as important as the wheel for the way we live. It can put you through with people orbiting around the planet, or it can guide you if you are color-blind or need assistance for a person with Down Syndrome. It has come a long way since Graham Bell invented it, in no small part to help his mother, who was almost completely deaf.
