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We may finally know what happened at Tunguska
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It caused havoc across swathes of the country
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In southern Australia, a population of tiger snakes is being injured - but by what?
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This rare bird lives exclusively in Madagascar's wet forests
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In a fight for territory, dominant males settle old scores
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These animals’ ability to control light renders them almost invisible
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How do these typically chill characters stay cool over the long polar summer?
Unmissable Stories
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The answer is more spooky than you might think
