Check out Joseph Grinnell's haircuts throughout his career:
Joseph Grinnell had many different hairstyles during his career. He became famous as an outstanding zoologist and mammalogist. However, the US biologist (1877–1939) was particularly known for his remarkable public appearances and his adorable character. Before his tragic passing at age 62 he was frequently featured in the press because of his superb looks. Check out Joseph Grinnell's former and current hairstyles in the image gallery right here: