Various effects of heat on the freezing of water were described by ancient scientists, including Aristotle : "The fact that the water has previously been warmed contributes to its freezing quickly: for so it cools sooner. Hence many people, when they want to cool water quickly, begin by putting it in the sun." Aristotle's explanation involved antiperistasis : "...the supposed increase in the intensity of a quality as a result of being surrounded by its contrary quality."