1859 English biologist Charles Darwin publishes On the Origin of Species, describing the theory of natural selection.
1898 Lorenz’s mentor, German biologist Oskar Heinroth, begins his study of duck and goose behavior, and describes the phenomenon of imprinting.
1959 Experiments by the German psychologist Eckhard Hess show that in imprinting, what has been learned first is remembered best; whereas in association learning, recent learning is remembered best.
1969 John Bowlby argues that the attachment of newborn babies to their mothers is a genetic predisposition.
The Austrian zoologist and doctor Konrad Lorenz was ...