Reality comes in layers. Everything we see in the world around us, scientists tell us, is made of atoms and combinations of atoms called molecules. Atoms are themselves made of tiny particles -- electrons, protons, and neutrons. Protons, in turn, are believed to be made of still tinier things called quarks. Is that the end of it? Probably not.

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"As the books The Trouble With Physics (Lee Smolin - the string theory renegade from Research in Motion's $100 million Perimeter Institute) and Not Even Wrong (Peter Woit, Columbia) show string theory is mostly hype, technically pseudo-physics. Some of it may survive - that remains to be seen. Therefore, this book is not worth reading." -- Jack Sarfatti