Navigation Links
Humans' Tree-Dwelling Ancestors May Have Also Walked Upright
Date:3/23/2010

Bipedalism possible more than 3 million years ago, findings suggest

TUESDAY, March 23 (HealthDay News) -- Fossil footprints made 3.6 million years ago are the earliest direct evidence that our tree-dwelling ancestors walked on two legs, U.S. researchers say.

The fossil footprints preserved in volcanic ash were discovered in Tanzania more than 30 years ago. Since then, experts have debated whether the tracks indicate a modern human-like bipedal stride.

In this new study, researchers built a sand trackway in a laboratory and filmed volunteers as they walked across the sand in a normal manner and in a crouched, chimpanzee-like gait. Three-dimensional models of the footprints were compared with the fossil footprints, which were found to be similar to modern human footprints.

"This more human-like form of walking is incredibly energetically efficient, suggesting that reduced energy costs were very important in the evolution of bipedalism prior to the origins of [modern humans]," study author David Raichlen, an assistant professor in the University of Arizona School of Anthropology, said in a university news release.

"What is fascinating about this study is that it suggests that, at a time when our ancestors had an anatomy well-suited to spending a significant amount of time in the trees, they had already developed a highly efficient, modern human-like mode of bipedalism," study co-author Adam Gordon, of the University of Albany, said in the release.

The study was published online March 22 in the journal PLoS One.

More information

Minnesota State University has more about human evolution.



-- Robert Preidt



SOURCE: University of Arizona, news release, March 19, 2010


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved

Page: 1

Related medicine news :

1. Dolphins May Warn of Health Risks in Humans
2. New drug for kidney transplant recipients effective in humans
3. Why humans outlive apes
4. Computers do better than humans at measuring some radiology images
5. Malaria Parasite Infects Gorillas, Not Just Humans
6. Launch of ImmortalHumans.com as a Result of Humankind's Drive to Cure Aging and Become Biologically Immortal Within this Century
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... June 26, 2016 , ... Many women are ... with endometriosis. These women need a treatment plan to not only alleviate symptoms ... can help for preservation of fertility and ultimately achieving a pregnancy. The specialists ...
(Date:6/25/2016)... Aliso Viejo, California (PRWEB) , ... June 25, 2016 , ... ... preset to fit their specific project," said Christina Austin - CEO of Pixel Film ... all fully customizable and all within Final Cut Pro X . Simply select ...
(Date:6/25/2016)... ... June 25, 2016 , ... On Friday, June 10, Van Mitchell, Secretary of ... award to iHire in recognition of their exemplary accomplishments in worksite health promotion. , ... Workplace Health & Wellness Symposium at the BWI Marriott in Linthicum Heights. iHire was ...
(Date:6/24/2016)... ... June 24, 2016 , ... June 19, 2016 is ... associated with chronic pain and the benefits of holistic treatments, Serenity Recovery Center ... suffering with Sickle Cell Disease. , Sickle Cell Disease (SCD) is a disorder of ...
(Date:6/24/2016)... ... June 24, 2016 , ... Dr. Amanda ... orthodontic treatment. Dr. Cheng has extensive experience with all areas of orthodontics, including ... accelerated osteogenic orthodontics. , Micro-osteoperforation is a revolutionary adjunct to orthodontic treatment. ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 2016 According to a new ... Pen Needles, Safety Pen Needles), Needle Length (4mm, 5mm, ... Mode of Purchase (Retail, Non-Retail) - Trends & Global ... the market for the forecast period of 2016 to ... Billion by 2021 from USD 1.65 Billion in 2016, ...
(Date:6/23/2016)... 2016 Research and Markets has announced ... Forecast to 2022" report to their offering. ... the patients with kidney failure, it replaces the function of ... patient,s blood and thus the treatment helps to keep the ... balance. Increasing number of ESRD patients & ...
(Date:6/23/2016)... , June 23, 2016 Research and ... Devices Medical Market Analysis 2016 - Forecast to 2022" ... The report contains up to date financial data derived ... Assessment of major trends with potential impact on the market ... of market segmentation which comprises of sub markets, regional and ...
Breaking Medicine Technology: