The Cologne archaeologist Dr. Ralf Vogelsang from the Africa Research Centre of the Institute of Prehistoric Archaeology and a team of international researchers have succeeded in dating layers in South Africa that provide information about stone tool innovation on the Middle Stone Age.
This archaeological epoch began at the same time as the earliest appearances of humans (homo sapiens sapiens), about 200,000 years ago, in Africa and differs from the European Middle Stone Age chronologically. It is categorized as an era of change and marked by the development of regional stone tool traditions, the appearance of many innovations and the emergence of significant new behaviour such as the production of art and jewellery.
It seems to be apparent that this surge in innovation is linked to the appearance of this new human form of anatomically more modern humans, who spread from Africa to Europe and superseded the Neanderthals. However, the chronological classification of the stone tool industry has always been very difficult.
With the help of the OSL method (Optically Stimulated Luminescence Dating) and under the direction of Dr. Zenobia Jacobs and Professor Richard Roberts from University of Wollongong (Australia), scientists have been able to date layers from new sites at the stone tool industries of Still bay and Howieson’s Poort. The OSL method measured when grains of quartz were last irradiated by sunlight at these sites.
According to the results, both industries operated between 60,000 and 80,000 years ago, were short-lived and did not coexist. The reasons for the rise and fall of these two cultural groups has been unclear until now, however, climate change does not seem to have played a significant role. Interestingly, the dispersion of modern man from Africa, which ultimately resulted in the in the supersession and extinction of the Neanderthals in Europe, occurred at the same time.www.sciencemag.org/cgi/content/abstract/sci;322/5902/733?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&fulltext=vogelsang&searchid
Patrick Honecker | alfa
Climate change weakens Walker circulation
20.10.2017 | MARUM - Zentrum für Marine Umweltwissenschaften an der Universität Bremen
Shallow soils promote savannas in South America
20.10.2017 | Senckenberg Forschungsinstitut und Naturmuseen
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
20.10.2017 | Information Technology
20.10.2017 | Materials Sciences
20.10.2017 | Interdisciplinary Research