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The use of this metal and chemical element can be traced back to 3,500 BC. Which chemical element is number 28 in the Periodic Table?
We breathe this chemical element every day and with each breath we take. Which number in the periodic table has oxygen?
He is connected with the first circumnavigation of Earth. What is this explorer called?
What year was the Internet a reality when 213 computers from different universities were tied together in a network that grew to 300,000 computers in the next ten years?
In which country was Enver Hoxha the president from 1944 to 1985?