Check out Willi Hennig's haircuts throughout his career:
Willi Hennig had many different hairstyles during his career. He became famous as a world-class biologist, entomologist, writer, zoologist and university teacher. However, the German biologist was particularly known for his unique fashion sense and his charming character. Before his death at the age of 63 he was often in the spotlight of tabloids because of his outstanding looks. Check out Willi Hennig's former hairstyles in the image gallery right here:
© Irma Hennig / cc-by-sa-3.0