East African artifacts support evolution of symbolic thinking in Middle Stone Age

ostrich shell beads are also significantly more sophisticated than any techniques used to produce the tools generally found in the Middle Stone Age. The beads, which are still produced by African Khoi-San (Bushman) cultures today, are typically produced by breaking the shell into small pieces, which are then drilled and strung on a fiber or sinew. The strung shell fragments' edges are then smoothed and rounded as a group to produce uniform beads.

The site was discovered by project co-director Bower and first test excavated in 1979. Since then the site has been excavated by Bower and Mabulla in 2000 and 2003 as a joint effort in the project known as Serengeti Genesis (www.serengetigenesis.org), a project focused on the record for the origin of modern humans in the Serengeti ecosystem. The excavation site is in the broad floodplain of the Loiyangalani River and has yielded both Middle and Later Stone Age artifacts. Though the area shows signs of habitation through a wide range of human history, Bower and Mabulla do not think it is likely that the beads or any of the associated items could be Later Stone Age artifacts that were mixed with the Middle Stone Age tools by past soil disturbance at the site. This conclusion results from the fact that the stone tools are all Middle Stone Age and the sedimentological analysis of the site by Vondra indicates that is it unlikely that LSA beads could have contaminated the MSA deposits.

"I'm fairly sure that these items are very old, and if that is so this could be a very important site," Marean said. "The beads are a tantalizing find and once we get some definitive dating it could have a major impact on the issue of the evolution of symbolic thinking. We hope that further digging at the site will yield more information. Ultimately it is going to take wider excavation to resolve the questions."


Contact: James Hathaway
Arizona State University

Page: 1 2 3

Related biology news :

1. Visiting African scientists collaborate with MBL scientists on infectious diseases
2. Genetic mutation linked to more aggressive breast cancer found more often in African-Americans
3. More aggressive breast cancer tumors found in African American women
4. Colorectal cancer rates in African Americans equal with insurance parity
5. Whites, African-Americans better rate medical care experiences when seeing same-race physicians
6. Team approach works better to reduce blood pressure in African-American men
7. Does a new hypothesis help explain higher levels of hypertension among African-Americans?
8. African American teen mothers have greater risk for low birth weight and premature babies
9. Lake ecosystem critical to East African food supply is threatened by climate change
10. Depression in African-American men may be barrier to high blood pressure control
11. U-M researchers seek answers for African-Americans at risk for prostate cancer

Post Your Comments:

(Date:5/14/2020)... ... May 12, 2020 , ... ... accurately and easily project contracted liabilities with payers, providers and pharmacies – ... discounts/rebates to Commercial and Government entities, Copay and Patient Assistance Program liabilities ...
(Date:5/11/2020)... ... May 11, 2020 , ... Octagos Health, ... patients with implanted cardiac devices. The Octagos software allows healthcare professionals access to ... greatly simplifies the management of remote transmissions and at the same time provides ...
(Date:5/1/2020)... ... April 30, 2020 , ... ... Siemens Healthineers and several healthcare VC firms announces an official launch of CareDoctors.com. ... is to enhance patient care experience by offering live video consultations with board ...
Breaking Biology News(10 mins):
(Date:5/9/2020)... ... May 08, 2020 , ... Worldwide Business with kathy ... business program on Sunday, May 10, 2020 and Wednesday, May 13, 2020 at 8:00pm ... exclusive interviews will spotlight key executives from Techolution and Bravado Pharmaceuticals ...
(Date:5/1/2020)... YORK (PRWEB) , ... April 30, 2020 , ... ... Awards were announced today, honoring the businesses, policies, projects, and concepts that are ... a revolutionary bioprinter for living cells, which has taken out the top prize ...
(Date:4/22/2020)... (PRWEB) , ... April 21, 2020 , ... ... FXIII chromogenic method for determination of FXIII. , Aniara Diagnostica, a multi-national distributor ... commitment to meeting today’s highest standards for product quality and cost-efficient delivery. ...
(Date:4/7/2020)... ... April 06, 2020 , ... Red Nucleus, a leading provider ... announced the release of at-home virtual learning resources for all client partners. , ... safety of our employees as we continue to implement measures to safeguard the ...
Breaking Biology Technology:
Cached News: