Navigation Links
Lessons from the orangutans: Upright walking may have begun in the trees

By observing wild orangutans, a research team has found that walking on two legs may have arisen in relatively ancient, tree-dwelling apes, rather than in more recent human ancestors that had already descended to the savannah, as current theory suggests.

These findings appear in the 1 June 2007 issue of the journal Science, published by AAAS, the nonprofit science society.

Upright walking, or bipedalism, has long been considered a defining feature of humans and our closest ancestors. One of the most popular explanations, known as the savannah hypothesis, suggests that the ancestors to chimps, gorillas and humans descended from the trees and began walking on the ground on all fours.

Over time, this four-legged gait would have evolved into the "knuckle-walking" that chimps and gorillas still use today and then into upright, two-legged walking in humans.

Paleontologists have conventionally used signs of bipedalism as key criteria for distinguishing early human, or "hominin," fossils from those of other apes. But, this distinction is complicated by recent fossil evidence that some early hominins, including Lucy (Australopithecus afarensis), lived in woodland environments, while even earlier forms such as Millennium Man (Orrorin) appear to have lived in the forest canopy and moved on two legs.

"Our findings blur the picture even further," said Robin Crompton of the University of Liverpool in Liverpool, Great Britain, who is one of the study's authors. "If we're right, it means you can't rely on bipedalism to tell whether you're looking at a human or other ape ancestor. It's been getting more and more difficult for us to say what's a human and what's an ape, and our work makes that much more the case."

Crompton and his colleagues, Susannah Thorpe and Roger Holder of the University of Birmingham in Birmingham, Great Britain, came to their conclusions by observing wild orangutans in Sumatra,
'"/>

Source:American Association for the Advancement of Science


Page: 1 2 3

Related biology news :

1. How many genes does it take to learn? Lessons from sea slugs
2. Household transmission of SARS: Lessons learned
3. Salk researchers make fast strides towards understanding how our body controls walking
4. Stimulation of the semicircular canals can artificially control human walking and balance
5. UGA scientists unravel molecular inch-worm structure of walking-pneumonia bacterium
6. Poplar trees redirect resources in response to simulated attack
7. Family trees of ancient bacteria reveal evolutionary moves
8. Alien woodwasp, threat to US pine trees, found in N.Y.
9. Shade trees getting scorched by plant disease
10. Seeing the forest and the trees
11. Why Christmas trees are not extinct
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Lessons from the orangutans Upright walking may have begun the trees

(Date:6/17/2015)... Fla. , June 17, 2015  Crossmatch™, ... today announced that its U.are.U ® 4500 ... Togo,s Eateries, Inc., a ... sandwich chain, to increase security, improve accountability and ... readers enable instant, non-repudiable identity confirmation for employee ...
(Date:6/16/2015)... June 16, 2015 Fingerprint Cards (FPC) ... that it will amount to at least 340 MSEK to ... the rapid increase in market growth and orders received the ... guidance that revenue for 2015 will exceed 1,500 MSEK to ... approximately 2,200 MSEK. Due to receipt of orders ...
(Date:6/12/2015)... June 12, 2015  Securus Technologies, a leading ... for public safety, investigation, corrections and monitoring, announced ... to electronically capture, analyze and identify participants of ... methods. This system can: ... enrollment and subsequent sign-on process is actually the ...
Breaking Biology News(10 mins):Togo's Eateries Improve Security and Accountability with Crossmatch Fingerprint Readers 2Togo's Eateries Improve Security and Accountability with Crossmatch Fingerprint Readers 3Fingerprint Cards Raises the Revenue Guidance for Q2 2015 and for the Full Year 2015 2Fingerprint Cards Raises the Revenue Guidance for Q2 2015 and for the Full Year 2015 3Securus Announces Patent Issued for Authorized Presence Verification During Video Visitation 2
... today announced a 60m investment in UK universities ... create successful businesses from their research, improve industrial ... was made, during Global Entrepreneurship Week, at a ... company Space Syntax, an SME which uses advanced ...
... http://www2.le.ac.uk/offices/press/media-centre/richard-iii DNA testing, environmental sampling ... being undertaken to determine whether the skeleton found ... there are also plans to do a facial ... University of Leicester,s Archaeological Services, has explained the ...
... lead to lifelong benefits, even improving physical ability and balance in ... in Age & Aging found an increase of about ... to a 5% faster walking time and 25% lesser chance of ... benefit of childhood milk intake on physical function in old age" ...
Cached Biology News:£60 million boost for science innovation 2£60 million boost for science innovation 3'It’s not like CSI': The science of the search for Richard III 2'It’s not like CSI': The science of the search for Richard III 3New study finds milk-drinking kids reap physical benefits later in life 2
(Date:6/30/2015)... ... June 30, 2015 , ... Students and faculty ... the first half of “Integrative Biotechnology,” an applied biotechnology course team-taught by faculty ... this course combines students from both universities and is taught on both continents. ...
(Date:6/30/2015)... June 30, 2015  NASA astronaut Kjell Lindgren , ... on his first mission to the International Space Station ... to 9 a.m. EDT Tuesday, July 7. Lindgren ... City, Russia . The interviews will be ... highlighting his mission training. To schedule an interview, ...
(Date:6/30/2015)... San Francisco, CA (PRWEB) , ... June 30, ... ... in FMT Patients , Study will provide new insights on mechanics of fecal ... announced a new partnership to study the microbiome of patients undergoing fecal microbiota ...
(Date:6/30/2015)... ... , ... The maximum number of shares proposed to be purchased in the ... unvested restricted stock). On June 29, 2015, the last trading day prior to the ... the OTCBB was $2.29 per share. , The tender offer will expire on July ...
Breaking Biology Technology:Rivier University and Beijing City University Academic and Cultural Exchanges Begin 2NASA Astronaut Preps for First Space Station Mission, Available for Media Interviews 2uBiome and OpenBiome Partner for Microbiome Study in FMT Patients 2uBiome and OpenBiome Partner for Microbiome Study in FMT Patients 3Cryo-Cell Commences Tender Offer to Purchase its Common Stock, Up to 750,000 Shares at $3.25 per Share 2Cryo-Cell Commences Tender Offer to Purchase its Common Stock, Up to 750,000 Shares at $3.25 per Share 3
... KONG, Jan. 3, 2012  SuperNova Diagnostics®, Inc., a privately-held ... announced that Neil J. Campbell, President and CEO, will ... 2012 in San Francisco, CA.  Mr. Campbell,s presentation is ... the Stockton Room at the Parc 55 Wyndham Union ...
... has developed a new test for deoxynivalenol (DON) that combines the ... quantitative precision of a more demanding testing method. The presence of ... to producers of animal feed and human food. Neogen,s ... from 0.3 to 6 parts per million (ppm) of DON after ...
... SAN DIEGO, Jan. 3, 2012  Amylin Pharmaceuticals, Inc. (Nasdaq: ... J.P. Morgan Healthcare Conference in San Francisco on Monday, January ... . Daniel M. Bradbury, president and chief executive officer ... The presentation and break-out session will be webcast through the ...
Cached Biology Technology:SuperNova Diagnostics® to Present at Biotech Showcase™ 2012 During JP Morgan Healthcare Conference January 9 - 12 2Neogen Launches Fully Quantitative Lateral Flow Test for DON 2
... CLS number is a new ... match Cornings product number. If ... order under the old Sigma-Aldrich ... service for assistance. ID clarifier: ...
... combines top performance with exquisite design. The ... and unparalleled temperature uniformity. The instrument has ... a spreadsheet or alternatively in a graphical ... on the push of a button and ...
Preparation TW--Compatibility: no end cap seals -Hybridization Tube for Hybrigene -Comp Dim: 240 80 mm -Material: borosilicate glass -Mfr Desig: Techne FHB-15...
... software for all your biopharmaceutical applications needs. ... single, scalable software package. The graphical user ... control of all Freedom instruments from simple ... with one liquid handling arm up to ...
Biology Products: