Homo erectus: The last of the first humans to walk upright have been discovered [CNN] Homo erectus remains from 100,000+ years ago have been discovered in Java; the newest remains discovered from the first hominid species to walk upright. The oldest homo erectus fossils on Java date to 1.7 million years ago.

Climate change wiped the species out. Too bad nobody was around to tell homo erectus climate change is fake news.