Quote of the day

K. S. Lashley (Quarterly Review of Biology 24:28, 1949):

When Phungst (1911) demonstrated that the horses of Elberfeld, who were showing marvelous linguistic and mathematical ability, were merely reacting to movements of the trainer's head, Mr. Krall, (1912), their owner, met the criticism in the most direct manner. He asked the horses whether they could see such small movements and in answer they spelled out an emphatic "NO."