Navigation Links
Stone Age humans needed more brain power to make big leap in tool design
Date:11/3/2010

Stone Age humans were only able to develop relatively advanced tools after their brains evolved a greater capacity for complex thought, according to a new study that investigates why it took early humans almost two million years to move from razor-sharp stones to a hand-held stone axe.

Researchers used computer modelling and tiny sensors embedded in gloves to assess the complex hand skills that early humans needed in order to make two types of tools during the Lower Palaeolithic period, which began around 2.5 million years ago. The cross-disciplinary team, involving researchers from Imperial College London, employed a craftsperson called a flintnapper to faithfully replicate ancient tool-making techniques.

The team say that comparing the manufacturing techniques used for both Stone Age tools provides evidence of how the human brain and human behaviour evolved during the Lower Palaeolithic period.

Neuroscientist Dr Aldo Faisal, the lead author of the study from the Departments of Bioengineering and Computing at Imperial College London, says: "The advance from crude stone tools to elegant hand-held axes was a massive technological leap for our early human ancestors. Hand-held axes were a more useful tool for defence, hunting and routine work. Interestingly, our study reinforces the idea that tool making and language evolved together as both required more complex thought, making the end of the Lower Palaeolithic a pivotal time in our history. After this period, early humans left Africa and began to colonise other parts of the world."

Prior to today's study, researchers have had different theories about why it took early humans more than 2 million years to develop stone axes. Some have suggested that early humans may have had underdeveloped motor skills or abilities, while others have suggested that it took human brains this time to develop more complex thoughts, in order to dream up better tool designs or think about better manufacturing techniques.

The researchers behind today's study say that their evidence, from studying both tool-making techniques, confirms that the evolution of the early human brain was behind the development of the hand-held axe. Furthermore, the team suggest that the advancement of hand-held axe production may have also coincided with the development of language, as these functions overlap in the same regions of the modern and early human brains.

The flintnapper who participated in today's study created two types tools including the razor-sharp flakes and hand-held axes. He wore a data glove with sensors enmeshed into its fabric to record hand and arm movements during the production of these tools.

After analysing this data, the researchers discovered that both flake and hand-held axe manufacturing techniques were equally complex, requiring the same kind of hand and arm dexterity. This enabled the scientists to rule out motor skills as the principal factor for holding up stone tool development.

The team deduced from their results that the axe-tool required a high level of brain processing in overlapping areas of the brain that are responsible for a range of different functions including vocal cords and complex hand gestures.

This is the first time that neuroscientists, archaeologists, anthropologists and flintnappers have teamed together, using cutting edge technology including data glove sensors and advanced modelling, to develop a deeper understanding of early human evolution.

In the future, the team plan to use their technology to compare tools made by Neanderthals, an extinct ancestor of humans, to glean insights into their brain development.


'/>"/>

Contact: Colin Smith
cd.smith@imperial.ac.uk
44-020-759-46712
Imperial College London
Source:Eurekalert

Related biology technology :

1. Rigel Earns Milestone Payments From AstraZeneca
2. Inspire MD Announce the MASTER (MGUARD for Acute ST Elevation Reperfusion) Randomized Trial in TCT2010. Study Chairman Will be Dr. Gregg Stone
3. Gladstone scientists identify strategy to reduce toxic proteins associated with Alzheimers disease
4. BMP Sunstone to Report Second Quarter 2010 Financial Results
5. Isis Earns $5 Million Milestone Payment From GSK for Designation of a Development Candidate to Treat an Undisclosed Rare and Serious Disease
6. Amira Pharmaceuticals Hits Two Development Milestones Related to FLAP Inhibitor Program
7. Key milestone towards the development of a new clinically useful antibiotic
8. RSB Spine, LLC, Announces Record Second-Quarter 2010 Revenue and Monthly Sales Milestone
9. NeoStem Achieves New Milestone as Company Joins Russell 3000 Index
10. Copan Installs Milestone 30th Walk-Away Specimen Processor (WASP)
11. BMP Sunstone Reports First Quarter 2010 Financial Results
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2017)... Chestertown, Maryland (PRWEB) , ... May 24, 2017 ... ... Johnston, was recently selected as treasurer for the Mid-Atlantic chapter of the ... runs through 2018. , The HBA Mid-Atlantic chapter board meets in person ...
(Date:5/24/2017)... , May 23, 2017 As Ebola resurfaces in ... four deaths and 20 suspected cases now reported, a new ... PubMed database, showed a correlation between the 2014 and 2017 ... counts rose sharply in 2012-13, which preceded the 2014 outbreak. ... the Ebola gene Replikin counts in 2014-15, which again precedes ...
(Date:5/23/2017)... ... 22, 2017 , ... NetDimensions has been ranked as a ... for Corporate Learning, 2017. , Aragon Research defines Leaders as organizations who possess ... against those strategies. NetDimensions’ ranking as a Leader due to its strengths in: ...
(Date:5/23/2017)... Diego, CA (PRWEB) , ... May 23, 2017 , ... ... matrix of polymeric molecules, can cause diverse pathologies ranging from food poisoning and catheter ... impact of biofilms is in the tens of billions of dollars per year, there ...
Breaking Biology Technology:
(Date:5/6/2017)... , May 5, 2017 RAM ... announced a new breakthrough in biometric authentication based ... quantum mechanical properties to perform biometric authentication. These new ... semiconductor material created by Ram Group and its ... entertainment, transportation, supply chains and security. Ram Group ...
(Date:4/13/2017)... , April 13, 2017 UBM,s Advanced Design ... will feature emerging and evolving technology through its ... Summits will run alongside the expo portion of the ... panels and demonstrations focused on trending topics within 3D ... design and manufacturing event will take place June 13-15, 2017 ...
(Date:4/11/2017)... NXT-ID, Inc. (NASDAQ:   NXTD ) ... appointment of independent Directors Mr. Robin D. Richards ... Directors, furthering the company,s corporate governance and expertise. ... Gino Pereira , Chief Executive ... their guidance and benefiting from their considerable expertise as we ...
Breaking Biology News(10 mins):