Navigation Links
There's something fishy about human brain evolution

Forget the textbook story about tool use and language sparking the dramatic evolutionary growth of the human brain. Instead, imagine ancient hominid children chasing frogs. Not for fun, but for food.

According to Dr. Stephen Cunnane it was a rich and secure shore-based diet that fuelled and provided the essential nutrients to make our brains what they are today. Controversially, according to Dr. Cunnane our initial brain boost didn't happen by adaptation, but by exaptation, or chance.

"Anthropologists and evolutionary biologists usually point to things like the rise of language and tool making to explain the massive expansion of early hominid brains. But this is a Catch-22. Something had to start the process of brain expansion and I think it was early humans eating clams, frogs, bird eggs and fish from shoreline environments. This is what created the necessary physiological conditions for explosive brain growth," says Dr. Cunnane, a metabolic physiologist at the University of Sherbrooke in Sherbrooke, Quebec.

The evolutionary growth in hominid brain size remains a mystery and a major point of contention among anthropologists. Our brains weigh roughly twice as much as our similarly sized earliest human relative, Homo habilis two million years ago. The big question is which came first ?the bigger brain or the social, linguistic and tool-making skills we associate with it?

But, Dr. Cunnane argues that most anthropologists are ignorant or dismissive of the key missing link to help answer this question: the metabolic constraints that are critical for healthy human brain development today, and for its evolution.

Human brains aren't just comparatively big, they're hungry. The average newborn's brain consumes an amazing 75-per cent of an infant's daily energy needs. According to Dr. Cunnane, to fuel this neural demand, human babies are born with a built-in energy reservoir ?that cute baby fat. Human infants are the only primate babies
'"/>

Source:Natural Sciences and Engineering Research Council


Page: 1 2 3

Related biology news :

1. Psst! Coffee drinkers: Fruit flies have something to tell you about caffeine
2. Bird sex is something else
3. Quantum Dots Research Leads to New Knowledge about Protein Binding in Plants
4. U-M scientist to talk about tissue engineering at AAAS
5. US life expectancy about to decline, researchers say
6. Surprising findings reported about iron overload
7. Alaskan puzzles, monitoring provide insight about North Pacific salmon runs
8. Important discovery about second most fatal cancer
9. Survey reveals women and doctors arent talking about HPV
10. Hopkins AIDS experts issue warning about global efforts to provide drug therapies
11. Geckos: Its not always about sex
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: There something fishy about human brain evolution

(Date:8/20/2014)...  The second annual Biometrics UnPlugged Executive Summit, ... Florida on September 15, 2014, will ... and Strategy at Samsung, and Philippe de Raet, Vice ... this year,s event is Mobility at the Crossroads ... UnPlugged: Mobility at the Crossroads of Commerce & ...
(Date:8/19/2014)... This news release is available in German . ... power are inherently intermittent energy sources. If a large amount ... in the future, excess energy will have to be stored ... for. However, existing storage capacities are far from adequate for ... better technologies. One important focus lies on battery systems that ...
(Date:8/19/2014)... from fish purchased at retail seafood counters in ... mislabeling can expose consumers to unexpectedly high levels ... "substitutions"which falsely present a fish of the same ... most dangerous mislabeling offense, according to new research ... "Accurate labeling of seafood is essential to allow ...
Breaking Biology News(10 mins):Biometrics UnPlugged: Mobility at the Crossroads of Commerce & Privacy to Feature Interactive Sessions with Samsung and Experian 2Asian inventions dominate energy storage systems 2Asian inventions dominate energy storage systems 3Seafood substitutions can expose consumers to unexpectedly high mercury 2Seafood substitutions can expose consumers to unexpectedly high mercury 3
... Chicago, November 23, 2010 Results of the world,s first ... or PrEP, were released online in the New England ... iPrEx, indicated an estimated 43.8% reduction of new HIV infections ... HIV, compared to those who took a placebo pill. ...
... how biological clocks adjust to having less sunlight in the winter ... shift work. Scientists studying the daily activity cycle in plants ... process that enables the plant,s genes to respond to the times ... of daylight in between. This system helps the plant to ...
... better tool to study how cells adhere to each other. ... stick together. Different kinds of cells have different kinds of ... focus on tens of thousands of them at a time ... but not on a single molecule. Sivasankar, an Iowa State ...
Cached Biology News:AIDS drug shown to prevent HIV in multinational trial of HIV-negative gay men 2AIDS drug shown to prevent HIV in multinational trial of HIV-negative gay men 3AIDS drug shown to prevent HIV in multinational trial of HIV-negative gay men 4Iowa State, Ames Lab researcher develops new way to study single biological molecules 2Iowa State, Ames Lab researcher develops new way to study single biological molecules 3
(Date:8/19/2014)... 2014 Robin Williams’ passing is a ... on an individual. Symptoms range from slowness of ... swallowing and severe depression. Parkinson’s disease progressively gets ... dopamine producing neurons of the brain. As these ... slowly and progressively gets worse, they look for options. ...
(Date:8/19/2014)... 2014 Research and Markets ... "Spectroscopy Equipment and Accessories - Global ... offering. This report analyzes ... Accessories in US$ Thousands by the following ... Spectrometers, NMR-EPR Spectrometers, Near Infrared (NIR) Spectrometers, ...
(Date:8/19/2014)... (PRWEB) August 19, 2014 In November 2012, ... Benefit Risk Evaluation Report (PBRER) in a new PSUR – ... post-authorization safety benefit-risk profile of a drug. Adopted in many ... , Present a comprehensive and critical analysis of ... , Highlight any new evidence of the potential ...
(Date:8/19/2014)... , Aug. 19, 2014 /PRNewswire/ - iCo Therapeutics Inc. ... today reported results of its Oral Amphotericin B ... reservoirs.  The study, conducted by ImmuneCarta®, the immune ... vitro effectiveness of Oral Amp B in ... in individuals despite intensive treatment with antiretroviral therapy. ...
Breaking Biology Technology:As We Mourn Robin Williams’ Passing, His Death Sheds Light on Patients Struggling with Parkinson’s Disease 2As We Mourn Robin Williams’ Passing, His Death Sheds Light on Patients Struggling with Parkinson’s Disease 3Global Spectroscopy Equipment and Accessories - Strategic Business Report 2014 2Top Five Best Practices for Developing Your Periodic Benefit Risk Evaluation Report (PBRER), New Webinar Hosted by Xtalks 2iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 2iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 3
... Wis. - So, it has come to this: ... wishing to vote in Wisconsin's Nov. 7 elections. , ,Or ... year claims and counter-claims swirling around the "wedge issue" of ... complete their doctoral degree by fall, here are a few ...
... Drawing on the immense popularity of the Fox Broadcasting ... , computer software designers are preparing to exploit a consumer ... Software , a producer of products for digital video, music, ... FremantleMedia Licensing Worldwide to develop two software products based ...
... reen Bay, Wis. - According to a ... cure all policy that will not only improve Wisconsin's business ... recovery. After all, this strategy of mutual cooperation and regional ... sleepy mountain town. , ,Wait a minute. Wasn't Denver ...
Cached Biology Technology:Fact and friction: Putting election-year stem cell claims under the microscope 2Fact and friction: Putting election-year stem cell claims under the microscope 3Fact and friction: Putting election-year stem cell claims under the microscope 4American Idol spurs music software 2Denver prospered because of "dreaded" TABOR 2Denver prospered because of "dreaded" TABOR 3
The Piezo Power MicroDissection (PPMD) system is designed for rapid isolation of single cells or small cell areas...
AC input: 50-60 Hz230 V...
AC input: 50-60 Hz 115-120 V...
... This reagent is formulated specifically for ... consistently high levels of activity for both ... storage at final dilution. This product ... stability providing the customer a longer shelf ...
Biology Products: