Readers of this blog may recall that I have blogged on the fact that you cannot go faster than the speed of light because mass increases as you approach the speed of light. WRONG! It is actually inertia that increases. Inertia and mass are basically the same thing at low speeds and physics professors use ‘relativistic mass’ to help teach students about the concepts of going fast. Advanced physics students have to be untaught this concept.

(The Great Courses – The Theory of Everything)