Neanderthals' Disappearance Gets More Mysterious
2007-09-13 0:00

By Jeanna Bryner | livescience.com


Comparison between Neanderthal and modern human skeletons. Photo: K. Mowbray, Reconstruction: G. Sawyer and B. Maley, Copyright: Ian Tattersall
Stocky and well-suited for the cold, Neanderthals once dotted the plains of Europe and western Asia before vanishing from Earth more than 20,000 years ago.

The mystery of what caused their demise has baffled scientists for decades, with one theory stating our hominid cousins failed to survive a big ice age that Homo sapiens apparently endured. New research rejects that thinking.

A study published in the Sept. 13 issue of the journal Nature suggests abrupt global cooling was not the final calamity that wiped out Neanderthals. The study does not, however, offer any direct clues about what did finally kill off the Neanderthals.

"Our findings suggest that there was no single climatic event that caused the extinction of the Neanderthals," said study team member Katerina Harvati, a paleo-anthropologist at the Max Planck Institute for Evolutionary Anthropology in Germany.

The Neanderthals lived as far back as 230,000 years ago, disappearing from the fossil record a few thousand years after modern humans appeared on the scene. But several scientific uncertainties have made it difficult for scientists to blame climate or modern humans for the extinction.

For instance, measurements of carbon isotopes have become a standard way of dating sediments and artifacts. However, the results give scientists a so-called radiocarbon date, which is based on the amount of time it takes radiocarbon to decay once an organism dies. Converting the radiocarbon number into calendar years is tricky and imprecise, the researchers say.

So team member Chronis Tzedakis of the University of Leeds and his colleagues realized they didn't need an actual calendar date. They devised a way to correlate estimates of dates for the Neanderthal demise with past climate records.

They applied the method to three dates proposed for Neanderthal extinction gleaned from artifacts preserved in Gorham's cave in Gibraltar, Spain, a site thought to have been occupied by some of the last surviving Neanderthals.

The dates include two fairly well-accepted estimates of the timing of their demise32,000 to 30,000 radiocarbon years ago and around 28,000 radiocarbon years agoas well as a more contentious estimate of around 24,000 radiocarbon years ago.

The team found the first two dates did not correspond with any extreme, abrupt climate events. The youngest and more controversial, radiocarbon estimate fell onto the paleoclimate record during a period just before the expansion of ice sheets and the onset of cold conditions in northern Europe, so the timing is not quite right. And the authors say that climate event was a 1,000-year gradual transition anyway, rather than an "instant ice-age."

"We're saying there is no abrupt, cold extreme event that correlates with any of those dates," said study team member Konrad Hughen of Woods Hole Oceanographic Institution in Massachusetts.

Article from: http://www.livescience.com/health/070912_neanderthal_demise.html



Related Articles
Researchers may remake Neanderthal DNA
History Of Humans Unravels As Scholar Exposed As Fraud
Subtle Bodies - Manipulating the Mind of Man
Red Ice Creations Radio - Lloyd Pye - Human Origins, Intervention Theory & Genetic Experimentation
Red Ice Creations Radio - Lloyd Pye - The Starchild Skull (Subscription)
The Hermetic Universe


Latest News from our Front Page

Professor: Reason Itself Is A White Male Construct
2015-07-04 3:55
A philosophy and religion professor at Syracuse University gave an interview to The New York Times Thursday in which he critiqued the notion of pure reason as simply being a “white male Euro-Christian construction.” Prof. John Caputo was being interviewed by fellow philosophy professor George Yancy for the 13th installment of an interview series Yancy conducts with philosophers regarding racial topics. Given its emphasis on first principles ...
The Broken Window Fallacy
2015-07-04 3:48
Youtube description: This short video explains one of the most persistent economic fallacies of our day. Source: youtube.com
Jenji Kohan and the Jewish Hyper-Sexualization of Western Culture
2015-07-04 3:33
As detailed in The Culture of Critique, Freud and his followers regarded anti-Semitism was a universal pathology which had its roots in sexual repression. The theoretical basis for this can be found in Freud’s Three Essays on the Theory of Sexuality where he linked aggression to the frustration of human drives — especially the sex drive. Kevin MacDonald notes that: ...
Confederate History - Dispelling the Myths
2015-07-03 3:28
History books, the media, the school systems, etc abound in falsehoods and inaccuracies of Confederate and Southern history. This fact sheet will help to clarify and dispell some of these rampant inaccuracies. MYTH - The War of 1861 - 1865 was fought over slavery. FACT - Terribly untrue. The North fought the war over money. Plain ...
Gays Rights May Open Door for Pedophile Rights
2015-07-03 3:31
Democrats have attempted to normalize pedophilia as a sexual orientation. A recent Supreme Court ruling on same-sex marriage may soon allow pedophiles to argue they are suffering discrimination. “Using the same tactics used by ‘gay’ rights activists, pedophiles have begun to seek similar status arguing their desire for children is a sexual orientation no different than heterosexual or homosexuals,” writes Jack Minor ...
More News »