"But man has still another powerful resource: natural science with its strictly objective methods." ― Ivan Pavlov Topic(s): Science More From Ivan Pavlov "It has long been known for sure that the sight of tasty food makes a hungry man’s mouth water; also lack of appetite has always been regarded as an undesirable phenomenon, from which one might conclude that appetite is essentially linked with the process of digestion." "Appetite, craving for food, is a constant and powerful stimulator of the gastric glands." "Edible substances evoke the secretion of thick, concentrated saliva. Why? The answer, obviously, is that this enables the mass of food to pass smoothly through the tube leading from the mouth into the stomach." More In Science "I came to water late. I learned to swim at the age of 20."― Liam Neeson "Change means movement. Movement means friction. Only in the frictionless vacuum of a nonexistent abstract world can movement or change occur without that abrasive friction of conflict."― Saul Alinsky "Teachers started recognizing me and praising me for being smart in science and that made me want to be even smarter in science!"― Steve Wozniak