7h 26min, apr 21, 3997882 y BC - Australopithecus (southern ape)
Some unique things about our earliest ancestors the Australopithecus is they had the brain size of an orange. That is only several inches so that is not very big. Another fact about our earliest ancestors is they were the first to use tools, they didn't know how to make them but they used anything they found such as sticks, rock, ect. One last fact about the Australopithecus is they had the most hair out of the humankind so that meant they have the most lice out of the humankind. In 2000 to 2003 AD we found a fossil of an infant from our ancestor the Australopithecus, from what I can tell about this jawbone is Australopithecus didn't eat meat because all of the teeth were just flat, from that all they eat is plants, berries and fruits. I found all of my info from the video becoming human https://www.pbs.org/video/nova-becoming-human-part-1/ documentary, and the image is blogs.scientificamerican.com map is from en.wikipedia.org the Australopithucus did not migrate anywhere, they just stayed in Africa.