Introduction -- Motion -- To be or not-to-be -- Atoms and the void -- Motion constrained -- How vs. why -- Enter Newton -- The laws of motion -- Action at a distance -- Matter and light -- Heat and the arrow of time -- Who's really moving and what's the correct time? -- Curved space : the new gravity -- What you see is what you get -- A footnote : quantum gravity -- Equations that go berserk -- The physicist's world