What is a fact that is so useless you don’t even know why you know it?

1. The only US state that doesn't share any letters with the word "mackerel" is Ohio.
   — curmevexas


2. Justin Timberlake is an anagram of "I'm a jerk, but listen".
   — DrBaggySmacker


3. Palm trees are not trees. They are the largest type of grass.
   — scurvy4all






4. The Titanic's first class swimming pool still has water in it.
   — ComputerSavvy


5. When the hight of Mount Everest was first officially calculated by Andrew Waugh in the 1850’s, he found his calculations to read EXACTLY 29,000 feet. Fearing no one would believe that his calculations would result in such a specific round number, he reported back 29,002 feet. Thus being know as the first man to put ‘two feet’ on Everest
   — Robwert84


6. An octopus's brain is arranged in a ring around it's mouth. Because of this, they can get severe brain damage of they eat too much.
   — Burritozi11a






7. golf balls have an average of 336 dimples
   — effthedab


8. A queen honeybee (Apis mellifera) has a special sack that she stores the sperm from her mating flight(s). She determines the gender of an egg by either fertilizing it or not at the time that the egg is laid. A fertilized egg produces a female worker bee, or another queen if the larva is fed royal jelly; an unfertilized egg produces a male drone bee. **A male honeybee does not have a father.** This is called haplodiploidy and isn't unique to the honeybee. All insects in the order of Hymenoptera are subject to this. You can associate this order with the Greek root word hymen, or membrane, and their membranous wings. Other members of Hymenoptera include wasps, ants, and other bees. *I'm a hobby beekeeper. Save the honeybees.
   — onewordnospaces


9. It's difficult to say Irish Wristwatch quickly over and over again for most people.
   — Threaded_Cane






10. You can see the moon from the great wall of China.
    — Vindaloovians


11. A koala's brain is flat
    — Stop_Sign


12. the mitochondria is the powerhouse of the cell
    — captain_hollywood






13. The nine-banded armadillo cannot roll up into a ball, but the three-banded armadillo can.
    — majikmyk


14. The paint on a Ferrari F40 is so thin, you can see the carbon fibre weave...
    — MartoScuderia


15. Female hyenas have dicks. I know this because when I took that Harry Potter patronous test everyone was doing, I got a hyena. Which was upsetting. And reading their wikipedia page was even worse.
    — knutmeg