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:5/4/2016)... , ... May 04, 2016 , ... ... Continence Nurses (WOCN) Society™ and Canadian Association for Enterostomal Therapy (CAET) will ... time saving and planning tools to attendees and exhibitors for the 2016 WOCN ...
(Date:5/4/2016)... Charles, LA (PRWEB) , ... May 04, 2016 , ... ... Charles, LA area has teamed up with Big Brothers Big Sisters of Southwest Louisiana ... now being accepted here . , Big Brothers Big Sisters of Southwest Louisiana ...
(Date:5/4/2016)... ... May 04, 2016 , ... Washington Wellness Center today announced its tenth anniversary ... What started out as an idea to provide a holistic approach to wellness ... , Developed by Dr. David Swanekamp, Chiropractic Physician , the wellness center offers ...
(Date:5/4/2016)... , ... May 04, 2016 , ... ... 2016. SS&A teamed up with one of the top website design companies to ... contains informative legal articles related to the law firm's main practice areas. These ...
(Date:5/4/2016)... ... May 04, 2016 , ... Momsense, ... nursing mothers. The company’s patented technology, The Smart Breastfeeding Meter, is designed to ... that the technology is now available for purchase at Target.com . ...
Breaking Medicine News(10 mins):
(Date:5/4/2016)... YORK , May 4, 2016 ... Share, Development, Growth and Demand Forecast to 2022 - Industry ... User (Hospital, Diagnostic Center and Others)" by P&S Market Research, ... $4,894.3 million in 2015, and it is expected to grow ... type, the high slice type segment is expected to witness ...
(Date:5/4/2016)... 4, 2016 In March, ... series of free workshops across Africa ... requirements for Good Distribution Practices (GDP). Good Distribution ... that products are consistently stored, transported and handled under ... or product specification. Only a few years ago, there ...
(Date:5/4/2016)... , May 4, 2016 ... addition of the  "Global Multiple Myeloma Market ... to their offering.       (Logo: ... Myeloma Market and Competitive Landscape Highlights 2016, ... products, Multiple Myeloma epidemiology, Multiple Myeloma market ...
Breaking Medicine Technology: