A group of pugs is called a grumble.
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Cats recognise the voice of their owner, but never evolved to care.
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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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There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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