Synopsis

Thomas Henry Huxley, an English biologist and anthropologist specialising in comparative anatomy. He is known as "Darwin's Bulldog" for his advocacy of Charles Darwin's theory of evolution.

If the leg of a living frog be cut off, the skin of the foot may be pinched, cut, or touched with red-hot wire, or with a strong acid, and it will remain motionless. But, if the other leg, which remains in connection with the body, be treated in the same way, it will be instantly retracted as far as possible from the irritating agent, while the animal will show signs of pain, and attempt to get away.

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