It is not possible to tickle yourself. The cerebellum, a part of the brain, warns the rest of the brain that you are about to tickle yourself. Since your brain knows this, it ignores the resulting sensation.

Dogs have a remarkable sense of smell, they are capable of differentiating odors in concentrations nearly 100 million times lower than humans can.

The monogram "RR" for Rolls-Royce has never been altered, except for when Sir Henry Royce passed away in 1933. Then it was changed from red to black.

A M A Z I N G   F A C T S