from II. - Africa
Published online by Cambridge University Press: 05 August 2014
History
In this chapter, the term “early hominins” refers to all fossil human ancestor species except for those belonging to the genus Homo. In his book The Descent of Man, published in 1871, Charles Darwin predicted that fossils of the earliest human ancestors would be discovered somewhere in Africa (Darwin 1871). This speculation was put forth based mainly on his observations of the physical similarities between living humans and African great apes, and the spatial distribution of chimpanzees and gorillas, which are found only in Africa today. Before the 1920s, our knowledge of the human fossil record went back only to the Neanderthals in Europe and some presumably earlier human-like forms in Asia (Dubois 1894). The idea that human antiquity could be greater than one hundred thousand years was unacceptable for many, and Africa was considered an unlikely place to look for our origins. As it turns out, Darwin’s longstanding hypothesis has been proven valid: except for the genus Homo, all human ancestors that have existed over the past 7 million years have been exclusively African.
In 1925, Raymond Dart of the University of Witwatersrand in Johannesburg, South Africa, described a juvenile fossil skull known as the Taung Child that was brought to him by quarrymen from a cave in Taung. Dart assigned it to a new genus and species: Australopithecus africanus (Dart 1925). Despite its relatively small brain, he concluded that this species was intermediate between apes and humans owing mainly to details of the brain endocast, the position of the foramen magnum and dental morphology. Most palaeoanthropologists in the 1920s rejected Dart’s claims that Au. africanus was intermediate between apes and humans, suggesting vigorously that the individual was just an ape (Keith 1925). The Taung Child did not fit the popular preconceived notion that the earliest human ancestor should have an ape-like body and a large, human-like brain.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.