Navigation Links
Our Ancestors Possessed Much Smaller Brains Than It was Thought

An ancient ancestor of ours was mentally less advanced than expected about 29 millions years ago, a new study by a Duke University primatologist has revealed.

Elwyn Simons identified the second and the most intact cranium found till date of the Aegyptopithecus zeuxis and subjected it to micro CT scanning to calculate the approximate dimensions of the brain encased inside the cranium.

Based on previous fossils collected at the same dig site in a quarry outside Cairo, scientists had hypothesized that this early monkey already would have had a relatively large brain. But they were surprised to find that the species "had a brain that might have been even smaller than that of a modern lemur's.

"This means the big-brained monkeys and apes developed their large brains at a later point in time, said Simons, a professor of biological anthropology and anatomy at the university.

Simons said he originally overestimated Aegyptopithecus' likely brain size based on the original 1966 skull, which has a bigger snout and pronounced crests, features that he now attributes to its being male.

Aegyptopithecus' brain is smaller than once thought. But other features in these skulls, and in many other Aegyptopithecus fossil pieces collected at the Egyptian site over four decades, suggest that this primate was already branching away from its lemurlike ancestry," said Simons.

"We also find that the visual cortex was large, which means that like many primates, this species likely had very acute vision. So the visual sense, which is regarded as a very important feature of anthropoids, or higher primates, had already expanded, he said.

The findings appear online in the journal Proceedings of the National Academy of Sciences (PNAS).


'"/>




Page: 1

Related medicine news :

1. Scientists Develop New Technology To Find About Human Ancestors’ Teet
2. Obesity Passed Onto Children By Ancestors Smoking And Chewing Betel Nuts
3. Strong Evidence Suggests Incidence Of Mating Of Ancestors With Neanderthals
4. Our Medieval Ancestors Were More or Less Similar to Us Than Previously Thought
5. Brain of Cocaine Addicts Smaller In Size
6. Researchers Begin Study To Find Out If Angioplasty Can Be Safely Done In Smaller Hospitals
7. Leading Biotech Companies Are Interested In Acquisition Of Smaller Companies
8. Average Age of Diabetics Smaller in China
9. Indian Men Need Smaller Condoms
10. FSA Proposes Packaging of Fatty Food in Smaller Packs
11. Babies Brains Are more Fragile
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/20/2017)... ... January 20, 2017 , ... Source Vitál Apothecary, a skin and ... essential oils, announced the company had a successful visit to the 2017 ECRM Diet, ... gives companies that work in the nutritional, sports and health industries a chance to ...
(Date:1/20/2017)... FL (PRWEB) , ... January 20, 2017 , ... International ... of nutritional and bodybuilding supplements, announced it attended the January ECRM trade show in ... bodybuilder and nutritional scientist who was determined to create a line of products that ...
(Date:1/20/2017)... ... January 20, 2017 , ... “The Angel”: a heartwarming and earnest tale ... each of his children. “The Angel” is the creation of published author, Marjorie Lund-Fontaine, ... City, and impassioned writer. , When asked of her new book, Marjorie says, “‘The ...
(Date:1/20/2017)... ... ... to Christmas:” a beautiful and enchanting tale that teaches children the true meaning of Christmas. ... in Oklahoma City, and a devoted woman of faith. , “Becoming a parent changes ... back of my mind for years, but actually doing it might have been a while ...
(Date:1/19/2017)... ... January 19, 2017 , ... ... E-learning system for Clinical and Regulatory education for Physicians, Physician Advisors, Case ... successful education methodology of Disease Specific Documentation Improvement. , The Aerolib Learning ...
Breaking Medicine News(10 mins):
(Date:1/19/2017)... LONDON , January 19, 2017 ... Grothey ; European Oncology & Haematology, 2016;12(Suppl 2):3-8; ... ... http://photos.prnewswire.com/prnh/20151014/276718LOGO) Published recently in ... the peer-reviewed journal from touchONCOLOGY, an article by ...
(Date:1/19/2017)... , Jan. 19, 2017 ViewRay, Inc. ... a federal institution supporting research in Germany ... and patient treatments at the University Clinic Heidelberg as ... The MRIdian Linac program will be headed by ... also heads radiation oncology at the German Cancer Research ...
(Date:1/19/2017)... Calif. , Jan. 19, 2017   Science ... is excited to announce that the first five ... Biology  (RP:CB) have been published in eLife today. ... project represents the first practical evaluation of reproducibility ... in reproducible studies. Unlike other assessments of reproducibility, ...
Breaking Medicine Technology: