Navigation Links
Early Humans More Advanced Than Thought
Date:10/28/2010

THURSDAY, Oct. 28 (HealthDay News) Early humans were using a highly skilled stone tool sharpening method 75,000 years ago in Africa, more than 50,000 years earlier than previously believed, a new study indicates.

This adds more evidence that modern behavior developed over time during the Middle Stone Age rather than after our ancestors migrated from Africa to Europe, as some scientists have thought.

Researchers from the University of Colorado at Boulder discovered that the delicate technique -- called "pressure flaking" -- was used by anatomically modern humans at Blombos Cave in South Africa during the Middle Stone Age. Previously, the earliest evidence of pressure flaking was from 20,000 years ago in France and Spain.

"This finding is important because it shows that modern humans in South Africa had a sophisticated repertoire of tool-making techniques at a very early time," study co-author Paola Villa, a curator at the University of Colorado Museum of Natural History, said in a university news release.

"This innovation is a clear example of a tendency to develop new functional ideas and techniques widely viewed as symptomatic of advanced, or modern behavior," she added.

Pressure flaking "takes place when implements previously shaped by hard stone hammer strokes followed by softer strikes with wood or bone hammers are carefully trimmed on edges by directly pressing the point of a tool made of bone on the stone artifact," according to background material in the study. Many stones -- with the exception of jasper, obsidian and high-quality flint -- also had to be heated before pressure flaking, researchers noted.

This technique enables better control of the sharpness, thickness and overall shape of two-sided items such as spearheads and stone knives, Villa explained.

The study appears in the Oct. 29 issue of Science.

More information

The Australian Museum has more about <
'/>"/>

Copyright©2010 ScoutNews,LLC.
All rights reserved  

Page: 1 2

Related medicine news :

1. Healthy Living Can Prevent Nearly 25% of Colorectal Cancers
2. The brains journey from early Internet to modern-day fiber optics -- all in 1 lifetime
3. Haptoglobin as an early serum biomarker of virus-induced type 1 diabetes in rats
4. Low Testosterone May Raise Risk of Early Death: Study
5. Proton therapy safe, effective for early-stage lung cancer patients
6. JCI online early table of contents: Oct. 18, 2010
7. Oklahoma clinical trial to test early detection technique for eye disease in premature infants
8. Mayo Clinic finds early success with laser that destroys tumors with heat
9. Nearly 1 in 5 W.Va. 5th Graders May Have High Blood Pressure
10. New Tool Shows Promise for Early Lung Cancer Screening
11. Effective methods for detecting early signs of tremor
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Early Humans More Advanced Than Thought
(Date:4/18/2014)... medical-testing device is being prepped to enter the ... diagnosis of certain diseases in remote areas, thanks ... of investigations aboard the International Space Station on ... space-tested concept of capillary flow to diagnose infectious ... Kelso, Ph.D., a researcher at Northwestern University in ...
(Date:4/18/2014)... April 18, 2014) Benaroya Research Institute at Virginia ... blocking a particular molecule in metastatic breast cancer reduces ... of lung metastases. BRI scientists have found in models ... tumors by 60 - 80 percent and can keep ... The $1.8 million five-year grant comes from the National ...
(Date:4/17/2014)... PHILADELPHIA The presence of chronic inflammation in ... aggressive, prostate cancer, and this association was found ... levels, according to a study published in ... of the American Association for Cancer Research. , ... some participants of the placebo arm of the ...
(Date:4/17/2014)... published today in PLOS Pathogens , children who ... common can mount an immune response to infection with ... bouts of high fever and illness and partially control ... findings may help researchers develop future interventions that prevent ... , Each year, approximately 200 million cases of malaria ...
(Date:4/17/2014)... McCullers, MD, was recently invited to submit a ... Reviews Microbiology , one of the world,s foremost ... disease specialist, and chair of the Department of ... Center, analyzed the epidemiology and microbiology of co-infections ... well as more recent 2009 novel H1N1 pandemic. ...
Breaking Medicine News(10 mins):Health News:Space-tested fluid flow concept advances infectious disease diagnoses 2Health News:Space-tested fluid flow concept advances infectious disease diagnoses 3Health News:Benaroya Research Institute evaluates immunology approach to blocking breast cancer 2Health News:Chronic inflammation may be linked to aggressive prostate cancer 2Health News:Chronic inflammation may be linked to aggressive prostate cancer 3Health News:Study sheds light on how the immune system protects children from malaria 2
... if there is no sound (silence). The brain is activated ... ,Pierre Fonlupt and Julien Voisin conducted the research ... activity of 11patients who were at rest with the help ... were actually listening to silence and also listen for the ...
... pain and very pale skin can all be early warning ... ,Thousand’s of children's lives will be saved the ... parents, which could speed diagnosis and treatment. ,Until ... child having a headache, stiff neck, sensitivity to light and ...
... team from McMaster University in their clinical trial reported ... drugs such as amiodarone combined with beta blockers such ... in ventricular arrhythmia patients undergoing Implantable Cardioverter defibrillator (ICD). ... to treat fatal cases of ventricular arrhythmias, but these ...
... a time when there is lot of relaxation in weight reduction ... to get this going is to listen to one’s inner voice ... ,Usually the little inner voice starts piping up as you lie ... "Take a handful of those potato chips," it urges., ...
... of H5N1 bird flu strain in Turkey had led to ... summer to avoid spread of bird flu virus into Britain. ... tourists are booking holidays in Turkish resorts.// The Association of ... Turkey is as usual and people seem to be not ...
... study conducted in Japan it has been shown that tomato ... is a known cause of the lung-destroying disease. // ... in tomatoes. ,This study appears to be the ... ,As a cautionary word by the researchers, 'We can't simply ...
Cached Medicine News:Health News:New warning signs for child meningitis 2Health News:Being Active In Winter Despite That Inner Urge 2
(Date:1/15/2014)... , Jan. 15, 2014 Most osteoporosis patients want ... a recent online survey* sponsored by Mission Pharmacal Company. ... National Osteoporosis Foundation online support community, revealed that 74 ... that comes in a form other than a pill ...
(Date:1/15/2014)... 2014  Novation, the leading health care supply chain expertise, ... reseller (VAR) national contracts that expand its portfolio to ... lower costs. These include manufacturer product and service agreements, ... and ongoing IT consulting support. New ...
(Date:1/15/2014)... , Jan. 15, 2014  Humberto C. Antunes,  Galderma  ... Award" from the Journal of Drugs in Dermatology ... Clinical Conference (ODAC). The event is January 17-20, 2014, at the ... . The ODAC is a ...
Breaking Medicine Technology:Mission Pharmacal Conducts Online Survey of Osteoporosis Patients 2Mission Pharmacal Conducts Online Survey of Osteoporosis Patients 3New Novation Information Technology VAR Contracts Offer Significant Savings to Hospitals 2Galderma's global leader honored with a "Lifetime in Dermatology Achievement Award" by Journal of Drugs in Dermatology 2Galderma's global leader honored with a "Lifetime in Dermatology Achievement Award" by Journal of Drugs in Dermatology 3Galderma's global leader honored with a "Lifetime in Dermatology Achievement Award" by Journal of Drugs in Dermatology 4
... , FRIMLEY, England, December 8 , ... Treatment Effectiveness,in the Trial, in Patients With Newly-Diagnosed Disease(1) , ... the Disease on nilotinib (300mg Twice-Daily and 400mg Twice-Daily) Than on,imatinib 400mg ... Only a Small Number of Patients,Discontinued Due to Adverse Events(1) , ...
... ... , ... - Will Use BrainTrack,s College Campus Data to Enhance Elsevier Evolve,Website Registrations ... technical and,medical information products and services, and BrainTrack,( http://www.braintrack.com ), the widely referenced ...
Cached Medicine Technology:Novartis Tasigna(R) (nilotinib) Trial Shows Superior Results to Glivec(R) (imatinib) in Newly Diagnosed, Chronic Phase Chronic Myeloid Leukaemia 2Novartis Tasigna(R) (nilotinib) Trial Shows Superior Results to Glivec(R) (imatinib) in Newly Diagnosed, Chronic Phase Chronic Myeloid Leukaemia 3Novartis Tasigna(R) (nilotinib) Trial Shows Superior Results to Glivec(R) (imatinib) in Newly Diagnosed, Chronic Phase Chronic Myeloid Leukaemia 4Novartis Tasigna(R) (nilotinib) Trial Shows Superior Results to Glivec(R) (imatinib) in Newly Diagnosed, Chronic Phase Chronic Myeloid Leukaemia 5Novartis Tasigna(R) (nilotinib) Trial Shows Superior Results to Glivec(R) (imatinib) in Newly Diagnosed, Chronic Phase Chronic Myeloid Leukaemia 6Elsevier Selects BrainTrack Directory as Supplier of College Data 2Elsevier Selects BrainTrack Directory as Supplier of College Data 3Elsevier Selects BrainTrack Directory as Supplier of College Data 4
Microforceps : Eckardt End & Side Gripping Forceps...
Blunt tipped forceps wlth a small grasping platform on each tip. For grasping fine membranes or grasping membranes adherent to the retinal surface....
Microforceps: Spaid Pic Forceps...
Blunt tipped forceps with small, slightly pointed grasping platforms on each tip. For general purpose (fine) membrane grasping and grasping membranes adherent to the retlnal surface....
Medicine Products: