In the seventeenth century, it was held by some that inside a human sperm there was a minute human being - a homunculus - that was planted inside the womb. Development consisted of the miniature homunculus enlarging and passing through birth and on to maturity-just like inflating a balloon.
Related Authors: Jean Piaget Temple Grandin Wangari Maathai Jonas Salk Sylvia Earle Bruce Lipton Norman Borlaug