HOME >> BIOLOGY >> NEWS
How long is a child a child?

With an innovative combination of a novel application of synchrotron imaging, high-resolution microtomography, and developmental analysis, the team reconstructed tooth growth and determined the age at death of a fossil juvenile from Jebel Irhoud, Morocco. This study represents the first non-destructive approach to characterize dental development with a high degree of precision, as synchrotron images reveal microscopic internal growth lines without damage to the specimen. The team found that the Moroccan fossil child showed an equivalent degree of tooth development to living human children at the same age. These findings and other evidence suggest that modern biological, behavioural, and cultural characteristics appeared relatively late in the past six million years of human evolution.

Modern human origins continues to be one of the most hotly debated topics among anthropologists, and there is little consensus about where and when the first members of our species, Homo sapiens, became fully modern. While fossil evidence tells a complex tale of mosaic change during the African Stone Age, almost nothing is known about changes in human life history, or the timing of development, reproductive scheduling, and lifespan. Tooth growth, and most importantly molar tooth eruption age, represents one of the most powerful clues to reconstruct growth processes in fossil humans. By using incremental growth lines in teeth, similar to annual rings in trees, developmental rate and time may be accurately established millions of years after death. Research during the past two decades has shown that early fossil humans (australopithecines and early Homo) possessed short growth periods, which were more similar to chimpanzees than to living humans. However, it unclear when, in and which group of fossil humans, the modern condition of a relatively long childhood arose.

In this study, tooth growth and eruption was examined in one of the earliest representatives of Ho
'"/>

Contact: Sandra Jacob
jacob@eva.mpg.de
49-341-355-0122
Max-Planck-Gesellschaft
13-Mar-2007


Page: 1 2

Related biology news :

1. Adult survivors of childhood leukemia exercise less, worsening high risk for obesity and illness
2. Gene identified for Crohns disease in children
3. Gene discovered for type 1 diabetes in children
4. Key to tackling malaria may lie in bed nets for adults and older children
5. Gene variant increases risk for alcoholism following childhood abuse
6. Cord blood may preserve insulin levels in children with type 1 diabetes
7. Researchers isolate new risk marker for overweight children
8. Study suggests other causes for childhood brain aneurysms
9. Study shows lizard moms dress their children for success
10. Lucky 13 as new gene discovery offers further hope for childhood blindness
11. Call of the child

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/16/2016)...   EyeLock LLC , a market leader of ... an IoT Center of Excellence in Austin, ... of embedded iris biometric applications. EyeLock,s iris ... security with unmatched biometric accuracy, making it the most ... EyeLock,s platform uses video technology to deliver a fast ...
(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a provider ... MegaMatcher Automated Biometric Identification System (ABIS) , ... multi-biometric projects. MegaMatcher ABIS can process multiple complex ... any combination of fingerprint, face or iris biometrics. ... SDK and MegaMatcher Accelerator , which ...
(Date:4/26/2016)... and LONDON , April ... part of EdgeVerve Systems, a product subsidiary of ... today announced a partnership to integrate the Onegini ...      (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ) ... their customers enhanced security to access and transact ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 22, 2016  Amgen (NASDAQ: AMGN ... QB3@953 life sciences incubator to accelerate the ... shared laboratory space at QB3@953 was created to help ... obstacle for many early stage organizations - access to ... sponsorship, Amgen launched two "Amgen Golden Ticket" awards, providing ...
(Date:6/22/2016)... , June 22, 2016 Research and ... Global Markets" report to their offering. ... billion in 2014 from $29.3 billion in 2013. The market is ... of 13.8% from 2015 to 2020, increasing from $50.6 billion in ... projected product forecasts during the forecast period (2015 to 2020) are ...
(Date:6/22/2016)... ... June 22, 2016 , ... Quantitative Radiology Solutions, ... and current participant in the Phase 1 Ventures program, is leveraging regional and ... Quantitative Radiology Solutions helps physicians make better treatment decisions by quantifying medical imaging ...
(Date:6/22/2016)... ... 22, 2016 , ... The Immigrant Journey Awards , ... to North Texas and the nation, recently held its annual luncheon program. ... civic and economic vitality of North Texas. Proceeds from the event are used ...
Breaking Biology Technology:
Cached News: