In the last years of his life, Harry Houdini became, to borrow the title from one of his books, "A Magician among the Spirits." As the most famous illusionist in the world, Houdini was naturally drawn ...

Matter is made up of small particles called atoms. Atoms can exist on their own or together as molecules. Atoms are very small and around 100,000,000 of them end to end would measure 1 centimetre.