arabtoday
Last Updated : GMT 17:47:44
Arab Today, arab today
Arab Today, arab today

Ancestor of neanderthals, modern humans elusive

Arab Today, arab today

Arab Today, arab today Ancestor of neanderthals, modern humans elusive

Tehran - FNA

The search for a common ancestor linking modern humans with the Neanderthals who lived in Europe thousands of years ago has been a compelling subject for research. But a new study suggests the quest isn\'t nearly complete. The researchers, using quantitative methods focused on the shape of dental fossils, find that none of the usual suspects fits the expected profile of an ancestor of Neanderthals and modern humans. They also present evidence that the lines that led to Neanderthals and modern humans diverged nearly 1 million years ago, much earlier than studies based on molecular evidence have suggested. The study, which will be published online this week by the Proceedings of the National Academy of Sciences, was carried out by an international team of scholars from The George Washington University, Konrad Lorenz Institute for Evolution and Cognition Research in Austria, Indiana University and Atapuerca Research Team in Spain. \"Our results call attention to the strong discrepancies between molecular and paleontological estimates of the divergence time between Neanderthals and modern humans,\" said Aida Gómez-Robles, lead author of the paper and a postdoctoral scientist at the Center for the Advanced Study of Hominid Paleobiology of The George Washington University. \"These discrepancies cannot be simply ignored, but they have to be somehow reconciled.\" P. David Polly, professor in the Department of Geological Sciences in the IU Bloomington College of Arts and Sciences, is a co-author of the study. Other co-authors are Spanish researchers José María Bermúdez de Castro, Juan-Luis Arsuaga and Eudald Carbonell, co-directors of the excavations at Atapuerca sites. The study resulted from a collaboration that developed when Gómez-Robles spent a semester at IU studying with Polly while she was a graduate student at the National Research Centre for Human Evolution and at the University of Granada, both in Spain. It also makes use of statistical methods developed by IU Bloomington biologist Emilia Martins. The article, \"No known hominin species matches the expected dental morphology of the last common ancestor of Neanderthals and modern humans,\" relies on fossils of approximately 1,200 molars and premolars from 13 species or types of hominins -- humans and human relatives and ancestors. Fossils from the well-known Atapuerca sites have a crucial role in this research, accounting for more than 15 percent of the complete studied fossil collection. The researchers use techniques of morphometric analysis and phylogenetic statistics to reconstruct the dental morphology of the last common ancestor of Neanderthals and modern humans. They conclude with high statistical confidence that none of the hominins usually proposed as a common ancestor, such as Homo heidelbergensis, H. erectus and H. antecessor, is a satisfactory match. \"None of the species that have been previously suggested as the last common ancestor of Neanderthals and modern humans has a dental morphology that is fully compatible with the expected morphology of this ancestor,\" Gómez-Robles said. The study also finds that the potential human ancestors discovered in Europe are morphologically closer to Neanderthals than to modern humans. This suggests the line leading to Neanderthals arose around 1 million years ago and the divergence of humans took place much earlier than previously thought. Other studies have placed the divergence around 350,000 years ago. The researchers argue that quantitative and statistical methods provide a better way to settle debates about human origins than the descriptive analyses that have been used in the past. \"Our primary aim,\" they write, \"is to put questions about human evolution into a testable, quantitative framework and to offer an objective means to sort out apparently unsolvable debates about hominin phylogeny.\" They also suggest applying their methodology to study other body parts represented in the hominin fossil record. What comes next? Answers to the ancestry question could come from studying hominin fossils from Africa, the researchers say. But the African fossil record from the era of interest is sparse. \"The study tells us that there are still new hominin finds waiting to be made,\" Polly said. \"Fossil finds from about 1 million years ago in Africa deserve close scrutiny as the possible ancestor of Neanderthals and modern humans.\"

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

Arab Today, arab today ancestor of neanderthals modern humans elusive Arab Today, arab today ancestor of neanderthals modern humans elusive

 



Arab Today, arab today
Arab Today, arab today Adidas Originals ‘reinterpreted’

GMT 14:52 2016 Thursday ,01 December

Adidas Originals ‘reinterpreted’
Arab Today, arab today At Milaidhoo Island, Maldives

GMT 08:42 2016 Wednesday ,07 December

At Milaidhoo Island, Maldives
Arab Today, arab today Paris's matchbox apartments

GMT 10:37 2016 Saturday ,24 September

Paris's matchbox apartments
Arab Today, arab today At least 50,000 Daesh fighters killed

GMT 07:57 2016 Friday ,09 December

At least 50,000 Daesh fighters killed
Arab Today, arab today 'Rookie' Trump must fall into line

GMT 08:02 2016 Tuesday ,06 December

'Rookie' Trump must fall into line
View News in Arabic - Education: تقارير وملفات
Arab Today, arab today
Arab Today, arab today
Arab Today, arab today The summer school raising aspirations

GMT 12:49 2016 Tuesday ,06 December

The summer school raising aspirations
Arab Today, arab today Ryan Gosling, Emma Stone immortalized

GMT 12:31 2016 Thursday ,08 December

Ryan Gosling, Emma Stone immortalized
Arab Today, arab today Australia's Rinehart, China group

GMT 10:02 2016 Friday ,09 December

Australia's Rinehart, China group
Arab Today, arab today Pluto's unruly moons

GMT 06:31 2015 Thursday ,04 June

Pluto's unruly moons
Arab Today, arab today Hyundai allows Saudi journalists

GMT 15:14 2016 Thursday ,01 December

Hyundai allows Saudi journalists
Arab Today, arab today Latest Infiniti QX to compete

GMT 13:16 2016 Saturday ,26 November

Latest Infiniti QX to compete
Arab Today, arab today France bets on Bollywood

GMT 10:48 2016 Tuesday ,06 December

France bets on Bollywood
Arab Today, arab today Swiss unveil stratospheric solar plane

GMT 13:47 2016 Thursday ,08 December

Swiss unveil stratospheric solar plane

GMT 11:20 2016 Monday ,05 December

By glorifying Soviet WWII 'myth'

GMT 10:52 2016 Tuesday ,06 December

Vanessa Redgrave makes directing

GMT 04:15 2016 Thursday ,30 June

World's largest uncut diamond fails

GMT 11:39 2016 Tuesday ,06 December

Indonesia expands protection

GMT 15:59 2015 Wednesday ,27 May

Seoul elevates gardening to high art

GMT 12:39 2016 Saturday ,26 November

Skin patch could help kids

GMT 13:17 2016 Friday ,25 November

Ajman Tourism launches time capsule

GMT 13:12 2015 Saturday ,09 May

Sheikh Sultan opens Sharjah Centre

GMT 09:53 2016 Sunday ,15 May

OMEGA official timekeepers
Arab Today, arab today
Arab Today, arab today
 
 Arab Today Facebook,arab today facebook  Arab Today Twitter,arab today twitter Arab Today Rss,arab today rss  Arab Today Youtube,arab today youtube  Arab Today Youtube,arab today youtube

Powered and Developed by FilmMatters

Copyright © 2016 Arabtoday

Developed by FilmMatters

© 2016 Arabtoday

arabtoday arabtoday arabtoday
arabtoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
arabtoday, Arabtoday, Arabtoday