Earth is home to about 1 million known animal species, each one representing an ancient tome of biological trivia.
However, much of this knowledge gets lost, leaving us to wonder about things like dinosaur divorce rates or amphibian dance moves!
The list below is a tribute to such trivia.
1. Octopuses have three hearts.
2. Butterflies can taste with their feet.
3. Sharks kill fewer than 10 people per year. Humans kill about 100 million sharks per year.
4. Wild dolphins call each other by name.
5. Young goats pick up accents from each other.
6. Horses use facial expressions to communicate with each other.
7. Elephants have a specific alarm call that means "human."
8. Squirrels can't vomit.
9. Owls don't have eyeballs. They have eye tubes.
11. Male gentoo and Adelie penguins "propose" to females by giving them a pebble.
12. A group of parrots is known as a pandemonium.
13. Polar bears have black skin.
14. Reindeer eyeballs turn blue in winter to help them see at lower light levels.
15. Warmer weather causes more turtles to be born female than male.
16. Honeybees can flap their wings 200 times every second.
17. Fourteen new species of dancing frogs have been discovered in 2014, raising the global number of known dancing-frog species to 24.
18. A sea lion is the first nonhuman mammal with a proven ability to keep a beat.