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Sunday, December 14, 2014

FIRE MASTERED IN ISRAEL 350,000 YEARS AGO - How do you boycott fire?

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Where else but in Israel could have man come up with such a major idea to improve human life?   A study of artifacts in an ancient cave near Haifa indicates that humans first started using fire there approximately 350,000 years ago.
The first Bar-B-que?
THE FIRST BAR-B-QUE
  • Burnt flints from Tabun Cave in northern Israel may help to rewrite history of human evolution and development of culture
  • Control of fire is too recent to explain the evolution of humans' big brains 
  • But it would have shaped the development of human culture and behaviour
  • Fire use seems to have occurred after humans expanded into cold climates
  • Evidence is thought to be 50,000 years older than any previously finds

  • The Tabun Cave was discovered in the limestone cliffs of Mount Carmel around 14 miles south of Haifa, Israel
    TABUN CAVE

    The Tabun Cave, located approximately 12 miles south of Haifa, “is unique in that it’s a site with a very long sequence,” according to University of Haifa archaeologist Ron Shimelmitz.  

    His new study examined  “step by step how the use of fire changed in the cave.”

    The Tabun Cave is rich in artifacts. It was occupied intermittently from 500,000 to around 40,000 years ago.  “Researchers examined artifacts previously excavated from the site, which are mostly flint tools for cutting and scraping, and flint debris created in their manufacture,” Science magazine wrote.

    Continue reading, including links to Israeli science and innovation news, and a list of Israeli products to boycott


    Flints found in the Tabun Cave showed signs of having been blackened and turned red by flames while others showed characteristic round pits where part of the stone had flaked off in the heat in what are called 'pot lids'An examination of approximately 100 layers of sediments in the depths of the cave deposits showed that none of the flints were burned from a period of approximately 350,000 years ago. Layers above that exposed many flints with red or black colors or cracking that showed they had been exposed to fire.

    Photo on the right:  Flints found in the Tabun Cave showed signs of having been blackened and turned red by flames while others showed characteristic round pits where part of the stone had flaked off in the heat in what are called 'pot lids'

    Researchers on the Journal of Human Evolution wrote that since wildfires were rare in cases, they were controlled by those who lit them.

    There are indications from other sites that humans used fire before then but there is no conclusive evidence that they were  able to master its use.
    Tabun Cave at Mount Carmel in northern Israel holds evidence of early humans from up to 500,000 years ago
    Debates still rage among experts whether the use of fire actually began up to 2 million years ago or only more recently.

    Harvard University’s Richard Wrangham said the Tabun caves study was “exciting” but not enough to convince him.

    He agrees with Prof. Shimelmitz agree that whenever fire began, it changed the lives of humans by allowing them to cook and keep warm.

    “There’s a reason people think we got fire from god,” Shimelmitz added.

    Given that wildfires rarely spread into caves due to the lack of vegetation, the scientists believe these flints were burned in the fires built within the cave by prehistoric humans.
     
    The discovery means our human ancestors in this area of Israel mastered control of fire nearly 50,000 years before other widely accepted evidence found to support the regular human use of fire.
     
    It could bring new understanding to the development of culture and human behaviour.
    Flint handaxes are among the stone tools to have been discovered in sediment layers in Tabun Cave in Israel
    HANDAXES FOUND IN TABUN CAVE
     
    While 350,000 years ago, the lower Paeleolithic period, is too late for fire to have played a role in the development of human's big brains as some scientists have suggested, it would have played a key role in the origins of social behaviour, argue the scientists behind the latest study.
     
    It has also been suggested that control of fire was one of the key developments that allowed early humans to spread into colder climates, but this expansion had already begun by 350,000 years ago.
     
    Dr Ron Shimelmitz said: 'Understanding the time frame of this "technological mutation" will help explain aspects of our anatomical evolution and encephalization over the last million years. 
     
    'It will also provide an important perspective on hominin dispersals out of Africa and the colonization of temperate environments, as well as the origins of social developments such as the formation of provisioned base camps.'

    Early humans are widely accepted to have gained complete widespread control of fire by around 125,000 years ago with the ability to kindle and light fires themselves.  However, the time when human ancestors first gained this essential technological ability has been highly controversial.
     Israeli children gather around a bonfire on the Jewish holiday of Lag Ba'Omer, in Jerusalem. Lag Ba'Omer commemorates the death of Rabbi Shimon Bar Yochai, one of the most important sages in Jewish history 1,800 years ago. The most well-known custom of Lag Ba'Omer is the lighting of bonfires throughout Israel and in Jewish communities worldwide. (Photo credit: Yossi Zamir/Flash 90)
    Israeli children gather around a bonfire on the Jewish holiday of Lag Ba'Omer, in Jerusalem. Lag Ba'Omer commemorates the death of Rabbi Shimon Bar Yochai, one of the most important sages in Jewish history 1,800 years ago. The most well-known custom of Lag Ba'Omer is the lighting of bonfires throughout Israel and in Jewish communities worldwide. (Photo credit: Yossi Zamir/Flash 90/Times of Israel)
     
    Some anthropologists claim that early humans, such asHomo erectus, began exploiting fire as long as 1.5 million years ago while still in Africa.
     
    However, much of this evidence - which consists of heated clays and charcoal fragments - is disputed and could have occurred as a result of natural bush fires.
     
    There are some who believe that fire played an instrumental role in the evolution of early hominins around two million years ago when our teeth and guts became smaller.
     
    They have also argued that fire played a key role in the evolution of larger human brains.
    However, many experts believe that early uses of fire may well have been opportunistic where early humans used natural bush fires rather than lighting fires themselves.
     
    Ron Shimelmitz (photo credit: Courtesy, University of Haifa)
    Dr Shimelmitz - Photo Univ of Haifa/Times of Israel
    The artifacts found at these sites often show few signs of burning, suggesting fire was not used regularly, according to Dr Shimelmitz and his colleagues, whose research is published in the Journal of Human Evolution.
     
    They say their findings at Tabun Cave are supported by evidence from other recent discoveries.
    Burnt flints, bones and ash found in the Qesem Cave in Tel Aviv, Israel, point towards the use of a hearth in this cave that has been dated to around 300,000 years ago.

    Dr Shimelmitz, along with researchers at the University of Arizona, said: 'While the earliest evidence of fire associated with hominin activities is much older, the data presented here indicate that fire became a regular and constant part of hominin behavioral adaptations in Eurasia only after 350,000 years ago.
     
    'The benefits of fire for processing food, altering raw materials or enhancing social interactions would be fully realized only when use of fire shifted from opportunistic and occasional to habitual and regular. 
      
    'Regular use of fire changed hominin existence and influenced the direction of evolution in our lineage in a diversity of ways . 
     
    'To the extent that humans' physical, cognitive and social evolution was affected by the emergence of habitual fire use, we should be able to trace evidence for such impacts most clearly in the hominins that inhabited the landscape over the last 350,000 years ago.'
     
    Tabun Cave has proved to be a rich site for archaeological evidence and is thought to have been inhabited intermittently through the Lower and Middle Paleolithic ages between 500,000 and 40,000 yaers ago.
     
    Around 82 feet of sand, silt and clay have built up in the cave, allowing archaeologists to date the signs of human habitation left in each layer.
     
    Among the remains found there were the skull fragments and bones from a female Neanderthal, that is thought to be around 120,000 years old.
     
    Large numbers of deer bones have also been found there, which has led to suggests that is served as a place where animals were trapped and then butchered by humans.
     
    Hundreds of flint tools, used to scrape and cut, have also been discovered together 

     
    However, Dr Shimelmitz said it was still unclear how the fires were started in the cave and may have been either by sparking kindling or keeping fire alight from natural bush fires.
     
    He said: 'The changes in burning frequency at Tabun and Qesem not only signal the point in time where the use of fire became habitual, but also indicate that humans had mastered the art of kindling fire. 
     
    'Unfortunately there are no means currently available to directly determine how ancient fires were started, so the latter remains simply a hypothesis for the time being.' 
     
    Dr Simon Underdown, an athropologist at Oxford Brookes University, said the latest findings in Israel were 'exciting'.
     
    He said: 'While we have evidence of fire use going back to almost 1 million years, it only appears irregularly and does not seem to have be a widespread behaviour - perhaps just being used by one or two bright sparks.
     
    'Crucially this paper shows that by at least 350,000 years ago fire was being regularly used as a tool by our ancestors. 
     
    'Having the ability to make and control fire, along with projectile weapons and stone tools, further cemented our position as an apex predator of the Pleistocene.
     
    'Fire use is one of the most important developments in human evolution but also very difficult to recognise in the archaeological record. 
     
    'Burnt material could have been from intentional campfires or from natural events such as bush fires. 
     
    'Fire allows food to be cooked which increases the calories in the diet while reducing the amount of energy our ancestors needed to use collecting it. But fire was also an important social tool. 
     
    'The heat allowed expansion into cold areas and the light extended the day and offered protection from predators. 
     
    'The attraction of an open fire is an old and primordial one for humans and here we can see the origins of that fascination.'

    Sources
    http://www.jewishpress.com/news/breaking-news/the-use-of-fire-may-have-begun-in-israel-350000-years-ago/2014/12/13/

    http://www.dailymail.co.uk/sciencetech/article-2871232/Did-humans-master-fire-Israel-350-000-years-ago-Burnt-flints-cave-near-Haifa-earliest-evidence-fire-use.html

    http://news.sciencemag.org/archaeology/2014/12/israeli-cave-offers-clues-about-when-humans-mastered-fire

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