HOME >> BIOLOGY >> NEWS
Soil suggests early humans lived in forests instead of grasslands

CHAMPAIGN, Ill. Carbon isotope evidence in almost 6-million-year-old soils suggests that the earliest humans already were evolving in and likely preferred humid forests rather than grasslands, report a team of scientists working in Ethiopia.

The discovery challenges long-held beliefs, beginning with Darwin, that humans did not evolve into upright beings and thrive until expanding tropical grasslands forced our chimpanzee-like ancestors out of dwindling forests about 4 million to 8 million years ago.

Hominid fossil sites from the later Pliocene period (2.5 million to 4.2 million years ago) previously had been found in savanna habitats. Researchers had been confident that the slightly earlier hominids living in the late Miocene also would be found in the savanna.

The expectation was that we would find hominids in savanna grassland sites that date back to about 8 million years ago. That hasnt happened, said anthropologist Stanley H. Ambrose of the University of Illinois. All older hominids have been found in forested environments.

The analysis was of fossil soils from paleontological sites in the Middle Awash region of Ethiopias rift valley, where the remains of a new subspecies of Ardipithecus ramidus have been discovered. They date to the late Miocene period (5.4 million to 5.8 million years ago). Scientists from four institutions report their findings in a pair of papers that appear in the July 12 issue of the journal Nature.

Ambrose collected fossil soil samples from the layers containing the newly found hominids. One of the fossils was found by team member Leslea Hlusko, also a UI professor of anthropology. Ambrose performed geochemical studies on the samples in his UI laboratory.

The region where the fossils were found is now a hot, dry semi-desert occupied by nomadic camel herders. At the time the area formed, it was higher in elevation, cooler, wetter and more forested.

Ambroses geochemical technique allows for a
'"/>

Contact: Jim Barlow, Life Sciences Editor
b-james3@uiuc.edu
217-333-5802
University of Illinois at Urbana-Champaign
11-Jul-2001


Page: 1 2

Related biology news :

1. Research suggests new avenue for stopping, preventing colon cancer
2. New sign language suggests children create languages fundamentals through learning
3. New research suggests early diet may play key role in protecting against childhood leukaemia
4. New research suggests link between maternal diet and childhood leukemia risk
5. Research suggests unborn children may be at risk from environmental pollution
6. Study suggests cell-cycle triggers might be cancer drug targets
7. Computer imaging of Archeopteryx skull suggests this dinosaur-bird link could fly
8. Study suggests humans can speed evolution
9. Droughts like 1930s Dust Bowl may have been unexceptional in prehistoric times, new study suggests
10. Genetic model for devastating form of paraplegia suggests new treatments
11. New research suggests previously unrecognized mechanism by which blood vessels are patterned

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Soil suggests early humans lived forests instead grasslands

(Date:3/4/2015)... 04, 2015 Research and Markets ... the "Global Biometrics Market Forecast and Opportunities, ... The market for biometric authentication systems is projected ... till 2020 The driving forces for ... needs, government projects and constant development in technology. ...
(Date:3/2/2015)... , March 2, 2015 Synaptics Inc. ... of human interface solutions, today announced a new ... designed to enable rapid and secure transactions and ... for gaming is a turnkey solution providing mouse ... to quickly integrate fingerprint ID solutions into their ...
(Date:3/2/2015)... 2015   Neurotechnology , a provider of high-precision ... SentiGaze Software Development Kit (SDK). The SentiGaze algorithm ... off-the-shelf webcams to track eye movements and generate heatmaps ... Heatmaps can be used for applications such as analysis ... The SDK can also be used to develop interfaces ...
Breaking Biology News(10 mins):Global Biometrics Market Forecast and Opportunities, 2020 2Global Biometrics Market Forecast and Opportunities, 2020 3Synaptics Unveils New Fingerprint ID Solution for Gamers 2Synaptics Unveils New Fingerprint ID Solution for Gamers 3Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 2Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 3
(Date:3/26/2015)... 2015 PAREXEL International Corporation (Nasdaq: ... research organization , announced today that the ... acquire all of the business assets of privately-owned ... of specialized pharmacovigilance services, based in Chandigarh, ... assessment, monitoring, and prevention of adverse effects ...
(Date:3/26/2015)... 26, 2015 Ale Gicqueau, Founder and ... of Clinical Affairs at Align Technology, on “ Conducting ... upcoming ACRP 2015 Global Conference and Exhibition on April ... , During the poster presentation, Ale Gicqueau and ... running a Postmarket Registry, the requirements and resources to ...
(Date:3/25/2015)... Balaton, MN (PRWEB) March 26, 2015 ... an upcoming episode of American Farmer, airing for the ... RFD-TV. The segment of American Farmer will explore the ... Agnition provides crop producers with a patented Microbial Catalyst™ ... farms and greater yields. The segment will air again ...
(Date:3/25/2015)... UK (PRWEB) March 25, 2015 ... uptake of smartphones have fuelled social media growth, ... being currently engaged in social networking. Insurance companies ... to communicate with clients and promote a diversity ... globe over are increasingly exploiting social networking services ...
Breaking Biology Technology:PAREXEL Announces Execution of Definitive Agreement to Acquire Quantum Solutions India, Strengthening Leadership In Pharmacovigilance Services 2PAREXEL Announces Execution of Definitive Agreement to Acquire Quantum Solutions India, Strengthening Leadership In Pharmacovigilance Services 3PAREXEL Announces Execution of Definitive Agreement to Acquire Quantum Solutions India, Strengthening Leadership In Pharmacovigilance Services 4Clinovo Presents at ACRP 2015 in Salt Lake City, Utah on April 25th-28th 2Clinovo Presents at ACRP 2015 in Salt Lake City, Utah on April 25th-28th 3Agnition to be Featured In Upcoming Episode of American Farmer on RFD-TV 2Social Media Role in Global Insurance Industry Examined by Timetric in New Market Research Report Published at MarketPublishers.com 2Social Media Role in Global Insurance Industry Examined by Timetric in New Market Research Report Published at MarketPublishers.com 3
Cached News: