Wie kalt war es in der Eiszeit?
Archives: natur
2009 28 Feb
How cold was it during the Ice Age?
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2009 26 Feb
Why does ice melt?
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Warum schmilzt Eis?
2008 4 Jun
What if the gravity on earth was higher?
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Was wäre, wenn die Erdanziehungskraft höher wäre?