Difference in age ?? NOTE : THIS IS JUST AN IMAGINATION ! Imagine that 2 babies are born on the same day & time (with names A & B)..A is allowed to live on earth .But B is taken in a rocket and is sent to space .(this rocket can travel in the speed of light!) A is now 10 years old .....on A's birthday B (from space) returns to earth....Will there be any difference in their ages ?