Navigation Links
Early human habitat was savanna, not forest
Date:5/27/2010

pe-like creature that stood about 4 feet tall and had a brain less than a quarter of the size of a modern day human's. This data was collected from ancient soils, plant fossils and other remains in the area now known as Aramis, in Ethiopia.

Levin's team found that tropical grasses, in fact, comprised between 40 and 60 percent of the biomass in Ardi's world.

Levin says her team's conclusion is noteworthy because, if scientists are to evaluate the environmental pressures that triggered the evolutionary success of some traits over others, they must clearly understand the environment itself.

"In their papers and summaries, White and his colleagues emphasize that A. ramidus had a mix of traits that suggest it was at ease both walking upright on the ground and moving through the trees on its palms," Levin explains. "If the habitat of A. ramidus was, in fact, a woodland with forest patches, where grasses were rare, then it's unlikely that the increased presence of grassy environments were the driving force behind the origin of upright walking in early human ancestors. However, if the habitat of A. ramidus included savannas where grasses were up to 60 percent of the available biomass, then we cannot rule out the possibility that open environments played an important role in human origins and, in particular, in the origins of upright walking. The scientific community and the public should not accept an exclusively woodland/forested habitat for A. ramidus and the origins of upright walking, because the data do not support it."

The critique concludes that although its authors do not judge the validity of the savanna hypothesis, the connection between human ancestors walking upright and the expansion of grasslands remains a viable idea.


'/>"/>

Contact: Lisa DeNike
Lde@jhu.edu
443-287-9960
Johns Hopkins University
Source:Eurekalert

Page: 1 2

Related biology news :

1. The making of a queen: Road to royalty begins early in paper wasps
2. NIH grants K-State researcher nearly $1.5 million to study antibiotic-resistant bacteria
3. Study finds protein that plays key role in early embryonic development
4. Federal report finds early births decline in most categories
5. First X-ray lasers early success brings approval for next-phase facility
6. Researchers find melanoma not caused by early UVA light exposure
7. A new biological explanation for sadness in early postpartum
8. UDs Zhuang wins NSF Early Career Award for research on how cells bypass damaged DNA
9. CNIC and Banco Santander set up research project on early cardiovascular risk factors
10. Early Earth absorbed more sunlight -- no extreme greenhouse needed to keep water wet
11. Traces of early Native Americans -- in sunflower genes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... eastern New South Wales, Australia when NASA,s Aqua satellite ... on July 11 (12:35 p.m. local time/11:35 p.m. EDT ... South Wales (NSW), the Moderate Resolution Imaging Spectroradiometer (MODIS) ... and spotted smoke (light brown) from various fires. Actively ... in red. , The New South Wales, Australia Government ...
(Date:7/11/2014)... The University of Chicago is creating a new ... at the University,s Institute for Molecular Engineering and ... million donation from the Millicent and Eugene Bell ... will reside within the Institute for Molecular Engineering. ... research project at the MBL,s Eugene Bell Center ...
(Date:7/11/2014)... researchers at the National Institute of Standards and ... their work more effectively, they often prove that ... was the case recently for M. Lorna De ... the growing specialization of glycomics. Glycomics is the ... glycans that are attached to proteins and lipids ...
Breaking Biology News(10 mins):New professorship in tissue engineering links molecular engineering, marine biology 2
... fuel emissions, planting new forests, or managing existing forests ... ability to act as a carbon sink. Research published ... Management shows that although planting trees alone is unlikely ... a significant effect in the longer term. Rik ...
... Rochelle, NY, April 7, 2008 The American Medical ... of women in medicine and the improvement of women,s ... ) as its official journal. Journal of Womens Health ... Inc ( http://www.liebertpub.com ). We are proud to ...
... documentary An Inconvenient Truth is a powerful example of ... audience. What is up for debate is whether it ... caused by human activities. Climate change experts express their ... in articles just published online in Springers journal, GeoJournal. ...
Cached Biology News:Forests' long-term potential for carbon offsetting 2Scientists debate the accuracy of Al Gore's documentary 'An Inconvenient Truth' 2
(Date:7/11/2014)... GENEVA , July 11, 2014 ... pleased to announce the appointment of John P. ... Campus Biotech   in  Geneva . ... on Campus Biotech in Geneva , ... internationally recognised neuroscientists. John P. Donoghue , founder ...
(Date:7/10/2014)... 10, 2014 Women in the ... to an additional family planning option. Sayana® Press ... at all levels of the health system and ... a widely used contraceptive—Pfizer’s Depo-Provera® (depot medroxyprogesterone acetate)—with ... is the first of four African countries expected ...
(Date:7/10/2014)... Terascala, the industry leader in HPC ... former vice president of product management for Flexera Software, ... marketing. Terascala’s software when combined with leading compute and ... performance and most reliable solutions for processing big data. ... expansion and broaden its product portfolio. His leadership in ...
(Date:7/10/2014)... July 10, 2014 EvoDerma ’s NOOME ... This rejuvenating device now comes with a second treatment cup ... time. , The new cup is thinner on the edges ... to target rough, thin and uneven surfaces on the face, ... for a stimulating treatment on areas such as the cheeks ...
Breaking Biology Technology:John P. Donoghue is Taking the Lead at the Wyss Center and is Appointed Professor at EPFL and University of Geneva 2John P. Donoghue is Taking the Lead at the Wyss Center and is Appointed Professor at EPFL and University of Geneva 3Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 2Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 3Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 4Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 5Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 6Terascala Expands Executive Team 2Terascala Expands Executive Team 3Introducing a New Bonus Treatment Cup for EvoDerma’s NOOME Anti-Aging Motion 2
... largest series of business-to-business IT events, is coming to Milwaukee again ... tradeshow and exposition will feature both global and Wisconsin-area technology companies. ... Gateway , Juniper Networks , Agilent , ... Solutions and Road Runner Business Class and other ...
... Middleton-based Bone Care International Inc. announced on Wednesday that ... , ,Genzyme and Bone Care have signed a definitive agreement ... all-cash transaction valued at $33.00 per fully diluted ... Bone Care's shareholders at a meeting on June 30, and ...
... bypass around Fond du Lac, Wis., opens later this ... a bridge like no other in the country. ... help to speed bridge-deck construction Externally, the bridge ... concrete deck reinforced with a novel fiber-reinforced polymer (FRP) ...
Cached Biology Technology:Polymer grid technology a boon for bridges 2Polymer grid technology a boon for bridges 3
...
...
... is >95%NEN Radiolabeled Ligands\n\nReceptor-related research has long ... new radiolabeled ligands selected to keep pace ... range of products and services for receptor ... state-of-the-art radioligands. If you do not find ...
... DNase (patent pending) was developed using a protein ... the DNA binding pocket of wild-type DNase I. ... protein for DNA. The result is a versatile ... DNA, and an ability to maintain at least ...
Biology Products: