Homo erectus javanensis, or Java Man, was discovered by Eugene Dubois in the late 19th century on the island of Java, Indonesia, and is marked as the first known fossil of Homo erectus. With a brain capacity of 775-975 cc, Java Man exhibited physical characteristics such as a flat skull, heavy brow ridges, and a massive jaw, while standing approximately 173 cm tall. Evidence suggests they lived in open environments without mastering fire and were not proficient hunters.