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:5/23/2017)... ... 23, 2017 , ... Drs. Allen Huang and Jeffrey Wang, ... Las Vegas, NV, and the importance of treating it immediately. They are now ... for peri-implantitis, with or without a referral. As experienced periodontists and implant specialists, ...
(Date:5/23/2017)... ... May 23, 2017 , ... Diagnotes, an Indianapolis-based digital ... feature on its secure clinical communication platform. The platform allows clinicians to easily ... the type and urgency of a situation. , “We know from our ...
(Date:5/23/2017)... ... May 23, 2017 , ... Orbita’s Nathan Treloar will discuss the role of ... Francisco. Titled Connected Health and IoT: Technology Innovators and Disruption , the workshop ... Associates, a market research and consulting firm specializing in emerging consumer technology products and ...
(Date:5/23/2017)... ... 23, 2017 , ... New patients looking for an alternative ... or without a referral, from the multi-specialty Dr. Smile practice. Dr. Esther Feldman ... in providing patients with the custom, convenient and long-lasting orthodontic treatment that helps ...
(Date:5/23/2017)... Mt. Horeb, WI (PRWEB) , ... May 23, 2017 , ... ... now invited to call Dr. Angela Cotey’s practice to schedule an appointment, with or ... dentistry services, and frequently offers pulpotomy treatments to pediatric patients as a healthy alternative ...
Breaking Medicine News(10 mins):
(Date:5/4/2017)... Fix Inc. (" Fortuna "), a private, clinical-stage biotech ... need for embryonic and fetal stem cells by using direct ... Fortuna announced today the launch of its Scientific ... PhD; Father Kevin FitzGerald , S.J., PhD; Col. (R) ... Giordano , PhD. "We are excited and honored ...
(Date:5/4/2017)... , May 4, 2017  DarioHealth Corp. (NASDAQ: ... health and big data solutions, today announced that it ... Company, and STI Technologies Limited to lower diabetes healthcare ... Through STI,s innoviCares card, which is available throughout all ... DarioHealth customers will be eligible for additional savings when ...
(Date:5/3/2017)... ROCKVILLE, Md. , May 3, 2017 /PRNewswire/ ... revenue growth of nine percent next year and ... solid organ and hematopoietic stem cell (HSCT) or ... and donor. Molecular testing technologies are well-suited for this ... healthcare-only market research publisher Kalorama Information. The various ...
Breaking Medicine Technology: