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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A cow produces around 200,000 glasses of milk in her lifetime.
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Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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Bats sleep 18-20 hours per day.
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A group of kittens is called a "kindle".
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