The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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The colossal squid has the largest eyes in the world.
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In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
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The male seahorse carries babies and 'gives birth' to them instead of the female.
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Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
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A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
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