Online edition of India's National Newspaper
Thursday, Jun 23, 2011
Google



Sci Tech
Published on Thursdays

Features: Magazine | Literary Review | Life | Metro Plus | Open Page | Education Plus | Book Review | Business | SciTech | NXg | Friday Review | Cinema Plus | Young World | Property Plus | Quest |

Sci Tech

Printer Friendly Page Send this Article to a Friend

Human brain developed 80,000 years ago

Advanced crafting of stone spearheads contributed to the development of new ways of human thinking and behaving.

This is what new findings by archaeologists according to Lund University press release.

The requirements

The technology took a long time to acquire, required step by step planning and increased social interaction across the generations. This led to the human brain developing new abilities.

200 000 years ago, small groups of people wandered across Africa, looking like us anatomically but not thinking the way we do today. Studies of fossils and the rate of mutations in DNA show that the human species to which we all belong — Homo sapiens — has existed for 200 000 years.

But the archaeological research of recent years has shown that, even though the most ancient traces of modern humans are 200 000 years old, the development of modern cognitive behaviour is probably much younger.

In the next issue of the well renowned Journal of Human Evolution, they present their new findings on the early modern humans that existed in what is now South Africa, approximately 80 000 years ago.

The findings show that people at that time used advanced technology for the production of spearheads and that the complicated crafting process developed the working memory and social life of humans.

Long time to learn

The technology led to increased social interaction within and across the generations. This happened because the crafting of stone spearheads took a long time to learn and required a lot of knowledge, both theoretical and practical. Producing a stone spearhead also required the ability to plan in several stages.

This social learning contributed to the subsequent development of early modern humans' cognitive ability to express symbolism and abstract thoughts through their material culture, for example in the form of decorated objects.

“The excavations have been carried out in a small cave; the location we have studied is called Hollow Rock Shelter and lies 250 km north of Cape Town.

We are cooperating with the University of Cape Town and the research we have just published is part of a larger research project on this location,” says Professor Lars Larsson. — Our Bureau

Printer friendly page  
Send this article to Friends by E-Mail



Sci Tech

Features: Magazine | Literary Review | Life | Metro Plus | Open Page | Education Plus | Book Review | Business | SciTech | NXg | Friday Review | Cinema Plus | Young World | Property Plus | Quest |


The Hindu Group: Home | About Us | Copyright | Archives | Contacts | Subscription
Group Sites: The Hindu | Business Line | Sportstar | Frontline | Publications | eBooks | Images | Home |

Comments to : thehindu@vsnl.com   Copyright 2011, The Hindu
Republication or redissemination of the contents of this screen are expressly prohibited without the written consent of The Hindu