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What Is a Side Stitch?
What Is a Side Stitch? A stitch is simply a sharp pain in one’s side. It is an intense stabbing pain under the lower…
Who First Used a Powered Dental Drill?
Who First Used a Powered Dental Drill? The first powered dentist’s drill was made by George Washington’s dentist, John Greenwood, who ad
Why Are Some People Color Blind?
Why Are Some People Color Blind? Scientists think that some people are color blind because they have an abnormality of the three pigments in
Why Do We Have Brains?
Why Do We Have Brains? The brain directs and coordinates movements and reflexes, registers sensations and is the supreme nervous organ by wh
Who Discovered Typhoid Vaccine?
Who Discovered Typhoid Vaccine? Typhoid vaccine, which gives immunity against typhoid fever, was discovered by Sir Almroth Wright (1861-1947