rezameutia juga ...
--- In [email protected], item abu <itemabu@...> wrote: > > Bahkan ada yg percaya jg kibulan sebangsa kibulan Maurice Bucaille kayak si > pinpin > > > > > >________________________________ > > From: Bukan Pedanda <bukan.pedanda@...> > >To: [email protected] > >Sent: Thursday, August 9, 2012 4:27 AM > >Subject: [proletar] SD: Early Human Ancestors Had More Variable Diet > > > > > > > > > > > >http://www.bbc.co.uk/news/science-environment-19184370 > > > >Dan manusia yang dungu- dungu kayak anjing seperti Abbas Amin, arra_s, ayub > >yahya, Dipo, johny-indon, PAREWA PAREWA, Pinpin, rezameutia, Roman Proteus > >safin_blanc masih saua percaya bualan orang Arab primitif penyusun khurafah > >najis al-Mushaf yang membual bilang tahayul allah hasil khayalan orang Arab > >primiitf itu menciptakan Adam dari tanah lihat... > > > >Otak yagn bisa dipakai buat berfikri dan harga diri itulah yagn tidak > >dimiliki > >Abbas Amin, arra_s, ayub yahya, Dipo, johny-indon, PAREWA PAREWA, Pinpin, > >rezameutia, Roman Proteus safin_blanc itu. > > > >Web address: > >http://www.sciencedaily.com/releases/2012/08/ > >120808132711.htm > >Early Human Ancestors Had More Variable Diet > >enlarge > > > >Scientists conducted an analysis of the fossil teeth, indicating that > >Australopithecus, a predecessor of early Homo, had a more varied diet than > >early Homo. (Credit: Image courtesy of University of the Witwatersrand) > > > >ScienceDaily (Aug. 8, 2012) â" New research sheds more light on the diet > >and home ranges of early hominins belonging to three different genera, > >notably Australopithecus, Paranthropus and Homo -- that were discovered at > >sites such as Sterkfontein, Swartkrans and Kromdraai in the Cradle of > >Humankind, about 50 kilometres from Johannesburg. Australopithecus existed > >before the other two genera evolved about 2 million years ago. > > > >Scientists conducted an analysis of the fossil teeth, indicating that > >Australopithecus, a predecessor of early Homo, had a more varied diet than > >early Homo. Its diet was also more variable than the diet of another distant > >human relative known as Paranthropus. > > > >An international team of researchers, including Professor Francis Thackeray, > >Director of the Institute for Human Evolution at Wits University, will be > >publishing their latest research on what our early ancestors ate, online in > >the journal, Nature, on August 8, 2012. The paper titled 'Evidence for diet > >but not landscape use in South African early hominins' was authored by > >Vincent Balter from the Ecole Normale Supérieure in Lyon, France; Jose´ > >Braga from the Université de Toulouse Paul Sabatier in Toulouse in France; > >Philippe Te´louk from the Ecole Normale Supérieure in Lyon in France; and > >Thackeray from the University of the Witwatersrand in Johannesburg in South > >Africa. > > > >According to Thackeray, the results of the study show that Paranthropus had > >a primarily herbivorous-like diet, while Homo included a greater consumption > >of meat. > > > >Signatures of essential chemical elements have been found in trace amounts > >in the tooth enamel of the three fossils genera, and the results are > >indicators of what South African hominins ate and what their habitat > >preferences were. > > > >Strontium and barium levels in organic tissues, including teeth, decrease in > >animals higher in the food chain. The scientists used a laser ablation > >device, which allowed them to sample very small quantities of fossil > >material for analysis. Since the laser beam was pointed along the growth > >prisms of dental enamel, it was possible to reconstruct the dietary changes > >for each hominin individual. > > > >Thackeray states that the greater consumption of meat in the diet of early > >forms of Homo could have contributed to the increase in brain size in this > >genus. > > > >Australopithecus probably ate both meat and the leaves and fruits of woody > >plants. The composition of this diet may have varied seasonally. > > > >Apart from the dietary differences, the new results indicate that the > >home-range area was of similar size for species of the three hominin genera. > > > >The scientists have also measured the strontium isotope composition of > >dental enamel. Strontium isotope compositions are free of dietary effects > >but are characteristic of the geological substrate on which the animals > >lived. > > > >According to the results all the hominids lived in the same general area, > >not far from the caves where their bones and teeth are found today. > > > >Professor Vincent Balter of the Geological Laboratory of Lyon in France, > >suggests that up until two millions years ago in South Africa, the > >Australopithecines were generalists, but gave up their broad niche to > >Paranthropus and Homo, both being more specialised than their common > >ancestor. > >Share this story on Facebook, Twitter, and Google: > > > >Other social bookmarking and sharing tools: > >Share on reddit Share on stumbleupon Share on pinterest_share Share on > >blogger Share on digg Share on fark Share on linkedin Share on myspace Share > >on newsvine | 17 > > > >Story Source: > > > >The above story is reprinted from materials provided by University of the > >Witwatersrand, via EurekAlert!, a service of AAAS. > > > >Note: Materials may be edited for content and length. For further > >information, please contact the source cited above. > > > >Need to cite this story in your essay, paper, or report? Use one of the > >following formats: > >APA > > > >MLA > >University of the Witwatersrand (2012, August 8). Early human ancestors had > >more variable diet. ScienceDaily. Retrieved August 8, 2012, from > >http://www.sciencedaily.com /releases/2012/08/120808132711.htm > > > >Note: If no author is given, the source is cited instead. > > > >Disclaimer: Views expressed in this article do not necessarily reflect those > >of ScienceDaily or its staff. > > > > > > > > > > > > [Non-text portions of this message have been removed] > ------------------------------------ Post message: [email protected] Subscribe : [email protected] Unsubscribe : [email protected] List owner : [email protected] Homepage : http://proletar.8m.com/Yahoo! 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