Proceedings of the Royal Society B (Biological Sciences)Seksi teorije nisu ograničene samo na fiziku, hemiju, matematiku i druge korisne nauke...a.k.a. jesu li nacisti u stvari bili u pravu?
Were our earliest ancestors from Asia?A new fossil primate from Myanmar - previously known as Burma - has led researchers to conclude that the common ancestor of humans, monkeys and apes evolved from primates in Asia, not Africa. A major focus of recent paleoanthropological research has been to establish the origin of anthropoid primates - monkeys, apes and humans - from earlier and more primitive primates known as prosimians. These include lemurs, tarsiers and their extinct relatives. The traditional view has been that anthropoids originated in Africa, but this has been challenged by recent discoveries in China, Thailand, and Myanmar. Earlier this year, the discovery of the fossil primate skeleton known as Ida in the Messel oil shale pit in Germany led some scientists to suggest that anthropoid primates evolved from lemur-like ancestors known as adapiforms. But according to Dr Chris Beard – a paleontologist at Carnegie Museum of Natural History in Pittsburgh, Pennsylvania - the new primate, Ganlea megacanina, shows that early anthropoids originated in Asia rather than Africa. These early Asian anthropoids differed radically from adapiforms like Ida, indicating that Ida is more closely related to modern lemurs than to monkeys, apes and humans. The 38-million-year-old Ganlea megacanina fossils, excavated at multiple sites in central Myanmar, belong to a new genus and species. Greatly enlarged canine teeth distinguish the animal from closely related primates, and heavy dental abrasion indicates that Ganlea megacanina used its teeth to pry open the hard exteriors of tough tropical fruits in order to extract the seeds. "This unusual type of feeding adaptation has never been documented among prosimian primates, but is characteristic of modern South American saki monkeys that inhabit the Amazon Basin," says Dr Beard. "Ganlea shows that early Asian anthropoids had already assumed the modern ecological role of modern monkeys 38 million years ago." Ganlea belongs to an extinct family of Asian anthropoid primates known as the Amphipithecidae. Two other amphipithecids were previously discovered in Myanmar, while a third was found in Thailand. A detailed analysis of their evolutionary relationships shows that amphipithecids are closely related to living anthropoids and that all of the Burmese amphipithecids evolved from a single common ancestor. Some scientists had previously argued that amphipithecids were not anthropoids at all, being more closely related to the lemur-like adapiforms. The discovery of Ganlea strongly supports the idea that amphipithecids are anthropoids, because adapiforms never evolved the features that are necessary to become specialized seed predators. Indeed, all of the Burmese amphipithecids appear to have been specialized seed predators, filling the same ecological niche occupied by modern pitheciine monkeys in the Amazon Basin of South America. During the Eocene when Ganlea and other amphipithecids were living in Myanmar, they inhabited a tropical floodplain very similar to the modern Amazon Basin.
Naucni radovi zanimljivi za siru javnost
Posted 01 July 2009 - 13:42:54
Posted 08 May 2010 - 04:56:32
Posted 08 May 2010 - 15:04:08
Posted 08 May 2010 - 23:01:00
Posted 10 May 2010 - 22:32:32
Originalni rad je za divno cudo besplantan na Science sajtu.No ceo taj rad se bazira na DNK materijalu iz 3 koskice nadjene u Hrvatskoj.Eeee, sumnjivo je to meni. To su mozda HR neandertalci imali bliske susrete prve vrste i mesali se sa lokalcima. A mi ostali, posebno mi iz SR, smo cist H. Sapiens. Salu na stranu. Ali to su zaista 3 koske iz jedne jedine pecine. Postoji li neki argument za uopstavanje tih rezultata na celu populaciju? No, masta radi. Sta mislite, ko je koga tu jebavo? Dobrovoljno ili ne? Npr. nema odgovarajuce cice za zenidbu pa onda daj sta das. Ili Mara brala jagode u sumi
Strndžakali smo se s Neandertalcima i imali male anatolske neandertalčiće!!
Posted 11 May 2010 - 00:46:59
Posted 11 May 2010 - 01:05:37
pa kako samo na osnovu anatomije?uostalom, kao da je bitno kakva je spika, bitno je da su dri nasli 'pozitivne' rezultate. ne daj boze da neko uzme i uradi neki bootstraping ili likelihood ratio estimate na tim podacima... a i da bi hteo ne moze, na osnovu samo 3 opservacije. u svetliju politicki korektnu buducnost pod parolom: svi smo mi pomalo neandertalci (sem afrikanaca).
Jedino se ne sećam da sam igde čitao bilo šta o razvijenosti i asimetriji levog planuma temporale u odnosu na desni, što bi mogao biti jedan indikator toga da li im je mozak imao adaptacije potrebne za jezik.
Posted 11 May 2010 - 07:06:56
Posted 11 May 2010 - 21:06:11
Budimo ljudi, i ako smo Neandertalci.
A meni baš kul ako jesmo po malo Neandertalci.
Posted 18 May 2010 - 22:51:23
Edited by Gonzo, 18 May 2010 - 22:56:11.