Sentences with phrase «modern human samples»

Sample sizes do not permit rigorous intragroup comparisons, but Neandertal molar tissue proportions evince less variation than the modern human sample.

Not exact matches

It is interesting that the most similar skulls in our sample come from recent Africans on the one hand, and on the other hand from those modern humans that lived in Europe between 20 - 30,000 years ago as, for instance,... [in one location] in the Czech Republic.»

But that study extracted ancient DNA from liver and intestinal samples using a method susceptible to contamination with modern human and bacterial DNA, Drosou's team argues.

The team's data revealed that the mtDNA was like that of modern humans and different from that of Neandertals, but critics argued that the samples may have been contaminated with modern human DNA when an undetermined number of people handled the fossils.

Evolutionary geneticists Svante Pääbo, Johannes Krause, and colleagues at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, ground up a 30 - milligram sample and extracted and sequenced all of the 16,569 base pairs of its mtDNA genome, using new techniques Pääbo's group has successfully employed to sequence both Neandertal and prehistoric modern human DNA.

Dr. Charlier argues that human remains in museums and scientific institutions can be divided into four categories, «ethnographical elements» such as hair samples with no certain identification; anatomical remains such as whole skeletons or skulls; archaeological remains; and more modern collections of skulls, used in now discredited studies in the early 20th century.

The team analyzed the projection of the brow ridge, facial shape, and cranial volume of 13 early Homo sapiens that lived before 80,000 years ago; 41 modern humans that lived 38,000 to 10,000 years ago; and skulls from a global sample of 1367 recent humans.

The study, which included 40 sites from Spain to Russia and employed the most recent sample preparation and statistical techniques to increase dating accuracy, found that Neandertals and modern humans did overlap for 2600 to 5400 years, depending on the exact region they inhabited.

The researchers caution that it's impossible to draw broad conclusions about Neandertal life histories from this one sample, such as whether Neandertals weaned their children earlier or later than modern humans who lived at the same time, or whether Neandertal children grew up faster, as some earlier studies have suggested — questions that could heavily bear on why Neandertals could not keep up with modern humans in the survival sweepstakes.

But when his team compared DNA sequences from the bacteria in the rock samples with those available in databases, he discovered an entire microbial ecosystem consisting of a wide variety of both archaebacteria and eubacteria, common «modern» bacteria that normally take up residence in lush places such as cheese and humans.

Scientists are planning an attempt to extract DNA from the «hobbit» Homo floresiensis, the 1 - meter - tall extinct distant relative of modern humans that was unearthed in Indonesia, following a study that suggests problems in standard sampling methods in ancient - DNA research could have thwarted previous efforts.

The use of the modern human reference samples for stature estimates are inappropriate because they assume body proportions akin to modern humans, which are not possessed by australopithecines.

1) The authors provide stature and mass estimates from the footprints using both modern human and australopithecine reference samples.

In this study we systematically analyze enamel thickness in a large sample of Plio - Pleistocene fossil hominins (n 1/4 99), extant hominoids (n 1/4 57), and modern humans (n 1/4 30).

Given ongoing uncertainty surrounding the human fossil record, palaeoanthropologists have come to rely on the results of genetic sequencing of samples from living populations to reconstruct the origins of modern humans in East Asia.

Gould reexamined Morton's data on cranial capacity variation in modern human populations and concluded that Morton had selectively reported data (see Box 1), manipulated sample compositions (see Box 2), made analytical errors, and mismeasured skulls in order to support his a priori views on intelligence differences between human groups.

Remarkably, investigations of highly preserved human coprolites (ancient stool samples retrieved from archeological sites) have demonstrated that their overall microbiome more closely resembles that of modern humans living in traditional rural settlements than that of the contemporary urban dweller [117].

The only result of your paper is the last sentenace: «We are in the very infancy of research on intermittent fasting in human subjects and future studies with larger sample sizes, longer durations and of better study design must be completed before any definite conclusions can be made regarding intermittent fasting and human health and the applicability to modern lifestyle.»

We are in the very infancy of research on intermittent fasting in human subjects and future studies with larger sample sizes, longer durations and of better study design must be completed before any definite conclusions can be made regarding intermittent fasting and human health and the applicability to modern lifestyle.