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:7/2/2020)... , ... July 01, 2020 , ... ... its phase 1a findings of Neihulizumab, a biologic for the treatment of steroid-refractory ... 2020. Led by hemato-oncologist Dr. Paul J Martin of the Fred Hutchinson Cancer ...
(Date:6/28/2020)... Switzerland (PRWEB) , ... June ... ... provider of enterprise software solutions for biopharmaceutical R&D, today announced that it ... company developing innovative, full-length multispecific antibodies (Multiclonics®), to support their translational and ...
(Date:6/23/2020)... , ... June 23, 2020 , ... ... sustainable healthcare, and Renovagen Ltd, a UK supplier and manufacturer of innovative portable ... support testing operations in the fight against the COVID-19 pandemic in Zambia. , ...
Breaking Biology News(10 mins):
(Date:6/23/2020)... ... 23, 2020 , ... Kerafast Inc. , developers of ... the availability of the Delta-G-VSV Pseudotyping System for coronavirus research applications. The system, ... SARS-CoV-2 viral entry and COVID-19 vaccine effectiveness at just biosafety level 2 (BSL-2) ...
(Date:6/23/2020)... ... June 22, 2020 , ... Dracen Pharmaceuticals Inc., announced today ... 22-24 during the American Association for Cancer Research Virtual meeting. One poster describes ... consistent single agent activity in KEAP1 mutant tumor models of NSCLC. ...
(Date:6/11/2020)... ... , ... Greffex, a leading genetic engineering company, with the ... vectors, recently announced a key manufacturing agreement with FUJIFILM Diosynth Biotechnologies to produce ... successful gene therapy delivery vehicle (vector) with broad applications for delivering treatments including ...
(Date:6/11/2020)... ... 2020 , ... Reducing carbon emissions has been and will continue to be ... market dips, ways to reduce CO2 is something we can’t avoid. , To ... biofuels being produced today are created from recycled cooking oil or crops. Unfortunately, these ...
Breaking Biology Technology:
Cached News: