It originates with the atoms which move of themselves. their dancing is an actual indication of underlying movements of matter that are hidden from our sight. You will see a multitude of tiny particles mingling in a multitude of ways. He uses this as a proof of the existence of atoms: "Observe what happens when sunbeams are admitted into a building and shed light on its shadowy places. 60 BC) has a remarkable description of Brownian motion of dust particles (though their movement happens to be mostly due to air currents). The Roman Lucretius's scientific poem On the Nature of Things (c.
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