Φυσική: Διαφορά μεταξύ των αναθεωρήσεων

[[Αρχείο:CollageFisica.jpg|285px|thumb|Διάφορα παραδείγματα από φυσικά φαινόμενα]]

[[Ρίτσαρντ Φέυνμαν|Richard Feynman]] begins his ''Lectures'' with the [[ατομική θεωρία|atomic hypothesis]], as his most compact statement of all scientific knowledge: "If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generations ..., what statement would contain the most information in the fewest words? I believe it is ... that ''all things are made up of atoms – little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another. ...''" {{cite book

|author=R.P. Feynman, R.B. Leighton, M. Sands