Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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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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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 oldest recorded elephant lived for 82 years.
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Domestic pigs average a top speed of about 11 miles per hour.
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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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