In the early nineties a group of scientists collaborating with Theo Colborn¹ recognized that these maldevelopments and malformations occurred more frequently in habitats with significant industrial pollution and that these abnormalities were linked to a certain group of hormone-mimicking chemicals. These chemicals have the capability to interfere with the body’s endocrine system. One of the first substances that was identified as a so called Endocrine Disrupting Chemical was the pesticide DDT (dichlorodiphenyltrichloroethane). After contamination of Lake Apokpa in Florida by a local DDT- manufacturer, the number of Mississippi alligators (Alligator mississippiensis) was reduced by up to 90 %. Smaller penises and malformed testicles had led to decreased fertility and higher mortality of embryos, resulting in fewer crocodile babies.