Sensory deprivation or perceptual isolation is the deliberate reduction or removal of stimuli from one or more of the senses. Simple devices such as blindfolds or hoods and earmuffs can cut off sight and hearing, while more complex devices can also cut off the sense of smell, touch, taste, thermoception (heat-sense), and 'gravity'.
Leonardo da Vinci (1452~1519), the great Italian artist, architect, and man of science, made the first scientific experiments In the field of aviation. He devoted many years of his life to understanding the mysteries of flight, and he left the world 160 pages of descriptions and sketches of flying machines.
Isaac Newton is well known as one of the greatest scientists who ever lived. Less well known is his deep belief in God and his conviction that scientific investigation leads to a greater knowledge of God the Creator of the universe. Isaac Newton was born at Woolthorpe, Lincolnshire, England on Christmas Day 1642.