History

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Bronze Age
A New Material is Discovered
With the use of bronze as a working material a new historical era started at about 2200 BC. Why was this particular metal so important for the development of humankind? Bronze consists of nine parts copper and one part tin. It is melted at 800 to 1,000 degrees. The bronze is poured into the mould and solidifies after a while. During the Bronze Age the moulds consisted mostly of sandstone. The latter was carved first and served as a template or negative of the objects, also called artefacts ─ such as flat axes, sickles, knife blades and swords. The raw materials copper and tin were mined in Europe, the Middle East and also Africa. A flourishing trade with them started.
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Air Traffic
Being able to fly has been a dream of humanity from time immemorial. But it does not even date back a century that people actually started being able to travel through the air. Since the 1960s, the number of flight passengers has been constantly increasing. Thus, the airspace is no longer dominated by birds but by man-made flying objects.
