1. The YKK on your zipper stands for Yoshida Kogyo Kabushikigaisha. 2. A blue whale’s heart is so big that a small child can swim through its veins. 3. The combination of an exclamation point and a question mark is called an "interrobang." Via buzzfeed.com 4. When you yawn and stretch at the time, you are "pandiculating." Via en.wikipedia.org 5. The dot over a "j" or an "i" is called a "tittle." 6. And the metal part on a pencil is called a "ferrule." 7. These two guys are voiced by the same person. 8. Tupac danced ballet in high school and ended up portraying the Mouse King in a production of The Nutcracker. Via jumpoff.tv 9. Elephants use the skin folds on their backs to crush mosquitos. Via wall-paper3.blogspot.ca 10. "Booby trap" spelled backward is "party boob." Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Via iruntheinternet.com 11. -40 Celsius and -40 Fahrenheit are the same temperature. Via lakevermilionrealestate.com 12. The barnacle has the largest penis in the animal kingdom when compared with its size. Via pygmylorisreid.wordpress.com 13. A flamboyance is a group of flamingos. Fernando Camino/Cover/Getty Images 14. And a group of pugs is called a grumble. Via chandigarhcity.olx.in 15. Barbie's real name is Barbara Millicent Roberts. Via toys.about.com 16. And Cookie Monster's is Sid. s3-ec.buzzfed.com 17. And Donald Duck's middle name is "Fauntleroy." Via disney.wikia.com 18. The Humpty Dumpty rhyme never says he's an egg. 19. The groove located in the middle of the place above your lips is called a "philtrum." 20. And the sleeve on the outside of a coffee cup is called a "zarf." Via en.wikipedia.org 21. A strawberry is not actually a berry, but a banana is. And this is what a wild banana looks like. 22. This is how pineapples grow. 23. And this is how cashews grow. Via tumblr.com 24. The Ottoman Empire still existed the last time the Chicago Cubs won a World Series. 25. "Sphenopalatine ganglioneuralgia" is the scientific term for brain freeze. Via tumblr.com 26. Armadillos give birth only to quadruplets. Via houstontx.gov 27. It's impossible to hum while holding your nose. Via thehomeguru.com 28. You can play Duck Hunt with two people — one to control the gun and the other to control the birds. Via memoryglands.com 29. You are more likely to die from a falling coconut than a shark attack. Via bookyourdive.com 30. All the water in Lake Superior would cover North and South America in one foot of water. Via gowaterfalling.com 31. Horses do not breathe through their mouths. Via blameitonthevoices.com 32. Ponies are not baby horses. Via wildgoddesslife.com 33. Adele and Lady Gaga are both younger than Carly Rae Jepsen. Via aceshowbiz.com 34. The difference in time between when the Tyrannosaurus rex and the stegosaurus lived is greater than the difference in time between when the Tyrannosaurus rex lived and now. Via huffingtonpost.com 35. And, probably most useless of all, the only state that doesn't contain any of the letters in the word "mackerel" is Ohio. Via canespace.typepad.com Many of the facts used above were culled from these Reddit posts that asked people to provide the most useless fact they know. Read them here, here, here, here, and here.