Special relativity, even though it's over 100 years old, is still one of the most puzzling and perplexing discoveries about the nature of the Universe itself. The (Newtonian) laws of physics that ...

You say there is no such thing as “centrifugal force” (1 March, p 47). Yes, there is – in the right frame of reference. There is, of course, no centrifugal force in an inertial frame of reference (in ...