Cats recognise the voice of their owner, but never evolved to care.
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Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
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Bats sleep 18-20 hours per day.
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There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
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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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