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)... ... 2017 , ... The Visiting Nurse Association (VNA) of Somerset Hills is proud ... and unique items from across the nation, this holiday-themed event will raise funds and ... the VNA. The boutique will be open Saturday, November 4 (10:00 a.m. – ...
(Date:10/13/2017)... ... October 13, 2017 , ... Global Healthcare Management’s 4th Annual Kids ... Milford, NJ. This free event, sponsored by Global Healthcare Management’s CEO, Jon Letko, ... run is geared towards children of all ages; it is a non-competitive, non-timed event, ...
(Date:10/13/2017)... ... October 13, 2017 , ... Talented host, actor ... on sciatica in a new episode of "Success Files," which is an award-winning ... innovation and investigates each subject in-depth with passion and integrity. , Sciatica occurs ...
(Date:10/13/2017)... ... October 13, 2017 , ... “The Journey: From the Mountains ... possible to save lost souls in the Philippines. “The Journey: From the Mountains to ... dedicated teacher of the Bible. She has taught all ages and currently teaches a ...
(Date:10/12/2017)... (PRWEB) , ... October 12, 2017 , ... ... advisory services for healthcare compliance program management, will showcase a range of technology ... Association for Assisted Living (NCAL) Convention and Expo to be held October 14–18, ...
Breaking Medicine News(10 mins):
(Date:10/11/2017)... FRISCO, Texas , Oct. 11, 2017 /PRNewswire/ ... healthcare services, has amplified its effort during National ... patients about hereditary cancer risks. ... Journal of Clinical Oncology calculated that more than ... to have inherited mutations in BRCA1 or BRCA2 and ...
(Date:10/5/2017)... 2017  In response to the nationwide opioid ... Surgeons (AAOMS) released prescribing recommendations that urge ibuprofen ... as a first-line therapy to manage a patient,s ... Recognizing the value and importance of ... Prescribing: Acute and Postoperative Pain Management" stresses that ...
(Date:10/2/2017)... -- Eli Lilly and Company (NYSE: LLY ) ... of 2017 on Tuesday, October 24, 2017. Lilly will ... the investment community and media to further detail the ... begin at 9 a.m. Eastern time. Investors, media and ... the conference call through a link that will be ...
Breaking Medicine Technology: