21. Broom's discovery was the second australopithecine after " Australopithecus africanus ", which Dart discovered. 22. Because the robust australopithecine fossils show these details, convolutions are included in the study of endocasts whenever appropriate. 23. One is the heavy-jawed, small-brained australopithecines , which became extinct about one million years ago. 24. That's a big problem if you're an australopithecine living a semiarboreal life in a forest habitat. 25. Even earlier species of australopithecines , found in Kenya, have been dated back to 4.2 million years. 26. The skull lacked of a sagittal crest and the braincase was much more rounded, suggesting it was not australopithecine . 27. Known from fossil remains found in Africa, australopithecines represent the group from which the ancestors of modern humans emerged. 28. The skull is dated to 2.5 million years ago, older than the later forms of robust australopithecines . 29. He and a four-member team carried out further studies of the Australopithecine family in the 1940s and 1950s. 30. The Taung Baby was the skull and bones of a young Australopithecine found in 1924 by Dr . Raymond Dart.