“If behavior is indeed governed by morphic fields, when some members of a species acquire a new pattern of behavior and hence a new behavioral field, for example, by learning a new trick, then others should tend to learn the same thing more quickly, even in the absence of any known means of connection or communication. The more members of the species that learn it, the greater should this effect become all over the world. Thus, for example, if laboratory rats learn a new trick in America, rats in laboratories elsewhwere should show a tendency to learn it faster. There is experimental evidemce that this effect actually occurs.”