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Tools and weapons during the Stone Age were not made exclusively of stone: organic materials such as antler, bone, fibre, leather and wood were also employed.The archaeological record, however, is biased in favour of items made of stone because these are far more durable than the organic materials, which are easily obliterated by the many processes of decay that they are subject to and can only survive under rare circumstances such as cold temperatures or very dry climate.During the Early Neolithic era, around 8,000 BCE, special ovens used to parch cereal grains and to bake bread were being built in the Near East, which allowed people to control fire and produce high temperatures in enclosed facilities.Initially, pottery was made in open fires, but the use of ovens added new possibilities to the development of pottery.Bronze is a mixture of copper and tin, which has greater hardness than copper, better casting properties, and a lower melting point.Bronze could be used for making weapons, something that was not possible with copper, which is not hard enough to endure combat conditions.Others say that this stone-bronze-iron pattern has hardly any meaning when applied outside Europe.
With the introduction of Bronze metallurgy, the Stone Age came to an end.
This “Three Age System” has received some criticism.
There are scholars who believe that this approach is too technologically oriented.
Thomsen, who came up with a framework for the study of the human past, known as the “Three Age System”.
The basis of this framework is technological: it revolves around the notion of three successive periods or ages: Stone Age, Bronze Age, and Iron Age, each age being technologically more complex than the one before it.