People couldn't survive without shelter., People used spears for hunting., In winter the lake is frozen., Caves were the best shelters., To keep warm people wore warm clothers and made fire., A glacier is a huge block of frozen snow., We saw a beautiful blue glacier on our trip., People stayed inside their warm shelters during the snowstorm., The hairy mammoth lived during the Ice Age., A mammoth was a large, hairy animal like an elephant that lived long ago., The scientists found a frozen mammoth inside the icy glacier., In the Ice Age it was important to keep warm to survive., The snowstorms were terrible.

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