Frog

File:Amazon-horned-frog.jpg

An Horned Frog in the Amazon.

The frog is a marine^{[Citation Needed]} amphibian. Frogs have often been the subject of scientific experiment, whether in high school science class dissections or Voltaire's 1766 experiments, in which he discovered that frogs hear with their legs.^{[Citation Needed]}

The discovery that a frog's leg will kick if an electrical shock is applied to it was the scientific basis behind the reflex tests now common in doctors' offices.^{[Citation Needed]}