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:10/13/2017)... ... October 13, 2017 , ... Dickinson ... offers insurance and financial preparation services, is providing an update on a charitable ... , Rock City Rescue is a locally recognized nonprofit that provides shelter and ...
(Date:10/13/2017)... Nevada (PRWEB) , ... October 13, 2017 , ... ... Hemp CBD Oil utilizing Purzorb™ technology. Applying the Purzorb™process to full spectrum CBD oil ... required and providing a CBD form that can be easily incorporated into liquid products, ...
(Date:10/13/2017)... , ... October 13, 2017 , ... The Visiting Nurse ... Market. Featuring a collection of specialty vendors and unique items from across the nation, ... quality-focused health and wellness services offered by the VNA. The boutique will be ...
(Date:10/13/2017)... ... October 13, 2017 , ... Coveros, a leader in agile ... a contract by the Center for Medicare and Medicaid Services (CMS). The Enterprise ... use of Agile methodologies in a consistent and high value manner across CMS ...
(Date:10/12/2017)... ... October 12, 2017 , ... Planet Fitness, one of the largest and fastest ... to open a flagship location in Covington, LA at 401 N. U.S. Highway 190, ... next to Office Depot in the Holiday Square shopping center. Its location allows it ...
Breaking Medicine News(10 mins):
(Date:10/10/2017)... , Oct. 10, 2017   West Pharmaceutical Services, ... solutions for injectable drug administration, today shared the results ... Adapter for improving the intradermal administration of polio vaccines. ... Vaccination Summit in May 2017 by Dr. Ondrej ... Department, World Health Organization (WHO), and recently published in ...
(Date:10/4/2017)... , Oct. 4, 2017 ... single-use, self-contained, illuminating medical devices, today announced regulatory ... Health Surveillance Agency (or Agência Nacional de Vigilância ... first single-use, cordless surgical retractor with integrated LED ... optimal access, illumination and exposure of a tissue ...
(Date:10/2/2017)... The Rebound mobile app is poised to become a vital ... prescription drug addiction. The app empowers users to develop an ... their dosage in a safe, controlled manner while maximizing well-being. ... 100,000 people to sign up will enjoy 3 months of ... ...
Breaking Medicine Technology: