Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
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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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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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Alligators can live up to 100 years.
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
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