Top 5 prehistoric sea monsters! (Great illustrations/images, but the text is in Japanese)
Australopithecus afarensis is an extinct hominid that lived between 3.9 and 2.9 million years ago. The most famous fossil is the partial skeleton named Lucy (3.2 million years old) found by Donald Johanson and colleagues.
"Sahelanthropus tchadensis is one of the oldest known species in the human family tree...sometime between 7 and 6 million years ago in West-Central Africa (Chad). Apelike features included a small brain, sloping face, very prominent brow ridges, and elongated skull. Humanlike features included small canine teeth, a short middle part of the face, and a spinal cord opening underneath the skull instead of towards the back..."