Navigation Links
They were what they ate
Date:6/27/2012

spectrometer to detect, in the vapor, the ratio of two forms of carbon (called "isotopes"): carbon-12 and carbon-13. These chemical "fingerprints" became locked into the sedibas' enamel in their youth, as their teeth formed. A reading heavy in carbon-12 indicates a diet comprising mostly forest foods, such as leaves and fruits, and a reading heavy in carbon-13 signals a diet that included larger amounts of savanna foods such as seeds, roots and grasses.

"We study tooth enamel because it's the hardest mineral in the body and preserves its chemical and isotopic signatures over time, so it has a lot to tell us," Passey explains. "We couldn't get the same analysis from a bone fragment, for instance, because it will be affected by the composition of the soil surrounding it."

Passey and the team concluded that Au. sediba consumed between 95 and 100 percent forest-based foods, despite other foods easily available to them.

Why is this important to know?

"Well, one thing people probably don't realize is that humans are basically grass eaters," he said. "We eat grass in the form of the grains that we use to make breads, noodles, cereals and beers, and we eat animals that eat grass. In America, we eat animals that are fed corn, and corn is grass, albeit one with an incredible history of human selection. So when did our addiction to grass begin? At what point in our evolutionary history did we start making use of grasses? Eating grasses is a hallmark of humanity, and we are simply trying to find out where in the human chain that begins."


'/>"/>

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

Page: 1 2

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
They were what they ate
(Date:11/6/2014)... Insilico Medicine, Inc, a Baltimore-based bioinformatics company focused ... announced a research collaboration with the international leader ... (OTC: CSBR). , "There are many companies utilizing ... Oncology,s TumorGraft technology is unique in a way ... generating vast amounts of valuable data. Our bioinformatic ...
(Date:11/4/2014)... SALT LAKE CITY, Nov. 5, 2014 – University of ... uses enzymes to help jet fuel produce electricity without ... can be used to power portable electronics, off-grid power ... appears online today in the American Chemical Society journal ... into electricity through a chemical reaction between a fuel ...
(Date:11/4/2014)... study examining only marketing directed at children on ... has found that the majority of black, middle-income ... marketing tactics. , Authored by Arizona State University ... is the first to examine the use of ... fast food restaurants and its relationship to demographics. ...
Breaking Biology News(10 mins):Insilico Medicine, Inc announces research collaboration with Champions Oncology, Inc 2Jet-fueled electricity at room temperature 2Fast food marketing for children disproportionately affects certain communities 2Fast food marketing for children disproportionately affects certain communities 3
... model for human exercise? According an article published in the ... habits make it a prime model of cardiovascular fitness. The ... requirements, and, according to the authors, this cold-blooded snake may ... adapting to prolonged exercise and in response to some diseases. ...
... isolated the first human embryonic stem cell lines specifically tailored ... females of various ages, suffering from disease or spinal cord ... Science, which is published by AAAS, the non-profit science society, ... These cell lines will enable the study of human disease ...
... issue of Science holds mixed blessings for scientists who ... The study, conducted by scientists from Cincinnati Children's Hospital ... in Germany, reveals important evidence that tells us more ... other hand, scientists offer caution in regards to the ...
Cached Biology News:Scientists generate patient-specific stem cells, Science study says 2Scientists generate patient-specific stem cells, Science study says 3Scientists generate patient-specific stem cells, Science study says 4Science study holds implications for gene therapy and stem cell biology 2Science study holds implications for gene therapy and stem cell biology 3
(Date:11/22/2014)... Rapids, MI (PRWEB) November 22, 2014 ... opportunity to simulate the proper management of life-like ... and test lung devices . Grand Rapids-based, Michigan ... plans to donate two of the respiratory simulation ... to $15,000 each. Grand Valley and Muskegon Community ...
(Date:11/21/2014)... November 19, 2014 The science of ... was shared with more than 200 primary students in ... from the University of Otago Physics Department and funded ... Otago students, members of the university’s OSA/SPIE Student Chapter ... early September, giving children from small, rural schools hands-on ...
(Date:11/21/2014)... York, NY (PRWEB) November 20, 2014 ... is now available as an open access journal featuring ... with infrared fluorescent proteins to preserve photoresponsiveness in the ... Two-color fluorescent in situ hybridization using chromogenic substrates ... chips for DNA, RNA, and protein electrophoresis , ...
(Date:11/21/2014)... SAN DIEGO , Nov. 20, 2014 /PRNewswire/ ... patient has been dosed in its Phase 1 ... and cisplatin for the treatment of malignant pleural ...  Polaris Group is conducting clinical trials on ADI-PEG ... other agents, for the treatment of several other ...
Breaking Biology Technology:Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 3Optics and photonics outreach programs share science, spark fascination with light 2Optics and photonics outreach programs share science, spark fascination with light 3BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 2BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 3Polaris Group Announces Treatment of First Patient in Phase 1 Study of ADI-PEG 20 plus Pemetrexed and Cisplatin in Malignant Pleural Mesothelioma And Non-Squamous Non-Small Cell Lung Carcinoma 2
... , , , , , Multiporator / Electroporator 2510 , , , ... Transformation Protocol , Protocol No. 4308 915.506 12/2001 , ... , , , , , ... , Cell type , ...
... , , , Multiporator / Electroporator 2510 , , , , , , ... Transformation Protocol , , Protocol No. 4308 ... , , , , , , , , ... vinelandii, , , Cell type ...
... , , , , , , ... Protocol No. 4308 915.045 11/2001 , , , , , ... , Cell line , 721.82, EBV ... , , Transfection with , ...
Cached Biology Technology:Borrelia burgdorferi 2Azotobacter vinelandii 2721.82 2
... professional, student, or faculty researcher, the new 4300 ... research and improve the quality of your data. ... edge that researchers using LI-COR DNA analysis systems ... 4300 System is a third generation instrument based ...
This modular benchtop fume hood ventilates and purifies chemical fumes, allowing safe indoor release of exhaust. Bonded charcoal filters remove most organic contaminants. Options include final HEPA f...
... Analysis Note: Protein determined by ... 3.2 M (NH 4 ) ... 7.0 Preparation Note: Affinity purified ... suspension • Additives: MgCl 2 ...
... PP2A, purified MW: 60kDa (A) ... glycerol, 20mM MOPS, pH 7.5, 500mM ... EGTA, 0.1mM MnCl2 1mM DTT, and ... in vitro dephosphorylation of proteins. Purification: ...
Biology Products: