The most expensive cow in the world was sold in 2009 for $1.2 million.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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Mosquitoes don't just bite you, they also pee on you.
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