1. When hippos are upset, their sweat turns red.

2. “Facebook Addiction Disorder” is a mental disorder actually identified by some psychologists.

3. May 29th is officially “Put a Pillow on Your Fridge Day“. The origins of Put a Pillow on Your Fridge Day are unknown, but common wisdom is that the holiday gives a modern day twist to the old tradition of putting linens in the pantry to bring luck. Why doing so will bring luck is anyone’s guess.

4. Human saliva has a boiling point three times that of regular water.

5. The person who invented the Frisbee was cremated, and per his final request, his ashes were mixed into plastic to make more Frisbees.

6. Reed Hastings was inspired to start Netflix after racking up a $40 late fee on a VHS copy of Apollo 13.

7. When three-letter airport codes became standard, airports that had been using two letters simply added an X, hence LAX.

8. Nutella was invented during WWII, when an Italian pastry maker mixed hazelnuts into chocolate to extend his chocolate ration.

9. Tsutomu Yamaguchi was in Hiroshima for work when the first A-bomb hit, made it home to Nagasaki for the second, and lived to be 93.

10. Prairie dogs say hello with kisses.

11. A 2009 search for the Loch Ness Monster came up empty. Scientists did find over 100,000 golf balls.

12. The 50-star American flag was designed by an Ohio high school student for a class project. His teacher originally gave him a B–.

13. Calvin Klein’s fragrance “Obsession for Men” is used by researchers to attract animals to cameras in the wilderness.

14. Barry Manilow wrote State Farm’s “Like a Good Neighbor” jingle and the jingle “I am stuck on Band-Aids, ’cause Band-Aid’s stuck on me.”

15. There’s a basketball court above the Supreme Court. It’s known as the Highest Court in the Land.

16. If you start counting at one and spell out the numbers as you go, you won’t use the letter “A” until you reach 1,000.

17. Redondo Beach, CA adopted the Goodyear Blimp as the city’s official bird in 1983.

18. Sleeping through winter is hibernation, while sleeping through summer is estivation.

19. The famous Aaron Burr “Got Milk?” ad from 1993 was directed by Michael Bay.

20. Marie Curie’s notebooks are still radioactive. Researchers hoping to view them must sign a disclaimer.

21. The Scots have a word for that panicky hesitation you get when introducing someone whose name you can’t remember: tartle.

22. How many licks does it take to get to the center of a Tootsie Pop? The world may never know. But on average, a Licking Machine made at Purdue needed 364.

23. Fredric Baur invented the Pringles can. When he passed away in 2008, his ashes were buried in one.

24. Ben & Jerry originally considered getting into the bagel business, but the equipment was too expensive.

25. The last time a Republican was elected president without a Nixon or Bush on the ticket was 1928.

26. Before Google launched Gmail, “G-Mail” was the name of a free email service offered by Garfield’s website.

27. In 1980, Detroit presented Saddam Hussein with a key to the city.

28. In Super Mario Bros., the bushes are just clouds colored green.

29. Sea otters hold hands when they sleep so they don’t drift apart.

30. The light emitted by 200,000 galaxies makes our universe a shade of beige. Scientists call the color “cosmic latte.”