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Opinion Polls in a Nutshell Ever wondered how opinion polls work? As election fever grows - so does the importance of opinion polls which today are an essential part of modern political life. Political strategists, voters and the media all lap up the data generated - but where does it come from? and just how easy is it to predict the future based on the opinions of the present? Play video Play in
©ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO https://creativecommons.org/licenses/by-sa/3.0/igo/ under Creative-Commons license The search for water on Mars The possibility of water on Mars has captured human imagination for over a century. In this free course, The Search for Water on Mars, find out more about how scientists have found evidence for water in the red planet’s past and present, and what this
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