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This video shows how species change - in 60 seconds
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Floating off into space would be the least of your worries
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Some species endure searing heat no human could handle
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Half-tonne birds and giant kangaroos once roamed the land
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They get up to some shocking stuff when we're not looking
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Her name is Isolde and she offers hope for the species
Unmissable Stories
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Four million years of human evolution in one lake
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Cities and islands really have been lost to the ocean
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We asked mathematicians for their favourites
