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26.05.2016: Why did the mongolian army suddenly withdraw from Hungary in 1242 CE? The reason might have been bad weather and mud, concludes a new study. The Swiss and US researchers present a new "environmental theory" for this mystery. More
Globalisation means that the world has grown small for both us humans and other creatures. New animal and plant species are constantly migrating to Switzerland or are introduced from other continents via a variety of routes.