1. It takes ~108 atoms laid in a row to span the width of a human fingernail (~1 cm.) If the same number of standard wooden pencils were laid end to end, they would circumnavigate the Earth’s equator more than 47 times.

  2. Human's ability smell petrichor (smell of wet earth from rain) is greater than a Shark's ability to smell blood in water.

  3. There was a time on the Earth where there were, at least, four different human species at the same time. Homo sapiens, Homo Neanderthalensis, Homo denisova and Homo floresiensis.

  4. Muscles do not develop the same in everyone and their exact origins/insertions can differ between people. In some the biceps have three or more heads, as opposed to the normal two. Some muscles are entirely absent, such as the psoas minor (found in about 40% of humans) and the sternalis (only 7.8%).

  5. I had a debate with my wife about body swapping in shows and movies. You wouldn’t be able to immediately start walking and talking like a normal person if your mind were swapped.

  6. Yeah. Disney cartoons from childhood had me believing for WAAAYYYY too long that turtles could wiggle out of their shells and run away in their undies.

  7. Eugene Aldrin, the father of the famous moon landing astronaut Buzz Aldrin, not only witnessed the Wright brothers’ first flight but also went to see his son land on the moon in his lifespan.

  8. I always find it amazing that the first flight and first moon landing essentially happened within 65-70 years of one another. Also a modern day iPhone has more processing power than the entire computer set up NASA has for that mission.

  9. Scientists also found that mice who were fed all their calories during a single feeding lived longer than those who were fed the same amount of calories but broken up throughout the day.

  10. Acacia trees were shown to send chemical signals to other trees that they were being overgrazed on, causing the other Acacia trees to increase the production of a specific chemical that would kill the animals overgrazing on them

  11. The California Highway Patrol once had an open offer of a full prime rib dinner at Lawry’s Beverly Hills and a case of scotch for any patrolman that could bust Steve McQueen for speeding in “The Green Rat”, his barely street legal 1956 Jaguar XK-SS. The specifics were to catch him speeding, pull him over, and issue a ticket.

  12. In the pineal gland in your brain, over time it will start to form tiny calcification, little mineral buildups. There is no known function for these but scientists named it corpora arenacea also known as dream sand.

  13. Butterflies and Moths can drink blood and tears in order to get nutrients. It’s called Mud-puddling. I think more horror movies should use this.

  14. Read a book about some Congo mercenaries in the sixties. The author said that as soon as someone would die scores of butterflies would show up to sip on the blood, especially when a large number of people died at one spot. So I guess there’s some truth to that.

  15. Never thought this knowledge would come in handy but, to explain further, its called parthenogenesis. Its not like they suddenly split in two like bacteria do, its a method of reproduction for if the female isnt able to reproduce sexually. They'll lay and hatch an unfertilized egg, literally creating a clone of themselves that has an exact copy of their DNA

  16. When a person receives a kidney transplant they don’t take out the old kidneys, they just shove em to the side and leave em in there.

  17. Guy with a kidney transplant here. Can confirm. The only time (according to my docs anyways) that they’ll remove kidneys is if they’re a danger to leave in. I assume that means cancerous or something? I didn’t ask. For me my kidney is placed in the bottom right side of my stomach. Still to this day I get nurses that are surprised to find a kidney hiding out near my belly button.

  18. The first imaging satellites used to drop film from space which was either caught by aircraft or recovered in the ocean. Check out the Corona space program.

  19. Similarly, you're unlikely to see squirrels or other small rodents with rabies since anything that can pass it on to them likely killed them

  20. Emma Morano of Italy was the last (documented and verified) person to die that was born in the 1800s. 29th November 1899 - 15th April 2017

  21. Interestingly, Phobos, the inner moon of Mars, is so close to the planet that it orbits faster (7 hours and 39 minutes) than the rotation of Mars (29 hours and 39 minutes). Therefore it rises in the west and sets in the east, creating the illusion that it's rotating retrograde when observed from the surface of Mars.

  22. The General Electric Company for many decades owned NBC. The three chimes of the NBC jingle are the notes G-E-C. During the radio era if that chime ever had a fourth note, that was a signal for NBC employees to go into work because a major news story (i.e. D-Day) was about to break.

  23. German chocolate cake was invented by an English-American baker named Samuel German and has nothing to do with the country of Germany.

  24. Similar to this, Australian Shepherd dogs were actually "created" in the US and have nothing to do with Australian herding dogs (Kelpies and Heelers).

  25. There was no “s” sound for the letter c in ancient Roman Latin. Thus Gaius Julius Caesar was pronounced “Gaius Julius Kaiser”. His name is where the Germans and Russians got their name for king (Kaiser and Tzar respectively).

  26. Your eyeballs have a separate enclosed immune system than the rest of your body. If somehow the two become aware of each other, your body will think your eyes are invaders and literally attack and dissolve them.

  27. My ophthalmologist in high school told me to never put my contacts in my mouth to moisten them (in an emergency dry-contact situation, I guess?). He went on to say that the problem isn’t bacteria from your mouth getting in your eye but that your eye is so gross you will give yourself an illness from your own eye germs. Thanks for reminding me how gross eyes are, ha.

  28. The sun is not yellow. When viewed outside earths atmosphere it is white. It only looks yellow due to our atmosphere "pulling" the blue light out, leaving it looking yellow. It's an illusion.

  29. Honeybees can be trained to sniff out land mines in war zones! Obviously dogs can do it but to avoid blowing up poor unsuspecting doggos, they figured out that bees could do the same thing and swarm the area without setting the mine off to alert people to its presence

  30. Lamborghini was a tractor manufacturer, and when Enzo Ferrari was asked about his new car at the time, he laughed and said something along the lines of "well it isn't a Lamborghini". So Lamborghini went into sport/super car making as competitors.

  31. Bob Ross was a Drill Instructor. When he stopped working as that, he promised he would not raise his voice at someone again. That's why he was so soft spoken.

  32. He actually broke that promise when the people that owned his business wanted him to sign a new contract but I can't remember what it entailed. There's a documentary on Netflix about Bob.

  33. That Wombats do cube shaped turds and have backward facing pouches so that when mama wombat is renovating she's not kicking dirt into her babies bedroom

  34. If you need to dry one or two pieces of clothing really quickly, throw them in the dryer along with a bunch of dry towels. Your clothes will dry in like 15 minutes or so. Some dryers have a moisture sensor so use the timed dry instead of the +/- dry

  35. Sunflowers are used to essentially clean radioactive soil. They suck it out of the soil and store it in their leaves and stems making the soil healthy and usable again ☺️🌻

  36. But it's a much much weaker bond. To expand on that, moisture in general accelerates the curing of cyanoacrylic adhesives like superglue. Excess moisture such as humidity also leads to more outgassing, which is a huge problem in manufacturing.

  37. When the Rubix Cube was first released a mathematician said it would take the average person 30 years, working 8 hours a day, to solve a cube saying it was impossible for someone without a master's in mathematics to solve it in under a month.

  38. Well if you have to figure it out on your own, it would take a lot of people a long time to do so. But now you can look up how to do it, which speeds up the process significantly

  39. I can’t solve one side in my entire lifetime. I’m pathetic. One time I saw a guy upside down on his head solving two cubes at the same time. It was amazing. I’ll find the pic. And post it somewhere.

  40. Spartan warriors were raised to be close lipped to foreigners, so when Phillip (Alexander the Great's father) came to invade while unifying Greece he, in typical Greek style, wrote a long letter ending in "Would you rather me cross your border as a friend or foe?"

  41. If you thoroughly shuffle a deck of cards, the exact order they’re in has almost certainly never been duplicated in the history of shuffled decks.

  42. There are hundreds of billions of stars in each galaxy in the universe, and there are hundreds of billions of galaxies. The number of stars in the known universe is estimated at about 200 billion trillion.

  43. The technology for the fax machine was invented in 1843. The feudal era in Japan ended in 1868 abolishing the samurai class. Abraham Lincoln lived until 1865. All of this combined lead to a 22 year period in which Lincoln could have received a fax from a samurai.

  44. Lincoln looked up from the message handed to him. His aide regarded his furrowed brow, his worn countenance. And then the President spoke, his eyes fixed on the nervous youth.

  45. Some birth control pills can cause vitamin B deficiency. Vitamin B is used to make seratonin. I’ve know a few people that got super depressed after starting birth control and taking B complex made a huge difference

  46. Beaver anal secretions have been used as a vanilla flavor substitute for certain foods and luxury cosmetics.

  47. Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. Now you know why the sky is blue.

  48. Thurl Ravencroft was the singing voice of The Grinch, the original voice of Tony The Tiger, and the narrator of The Haunted Mansion at both major Disney parks (-land and -world)

  49. President John Tyler was born in 1790 when George Washington was President. He has a grandson currently alive. 3 generations span all 46 presidencies.

  50. 2021-1790 is 231 years. That means 3 generations of kids where the dad was in his late 60s at best (assuming the surviving grandchild is 100 today).

  51. The European, Iranian, and North Indian languages are all related to each other and we've reconstructed some of what that original language might have looked like:

  52. If you stare at your own reflection in dim lighting for a few minutes, your face will begin to distort and you will essentially begin to hallucinate. Don’t do it. It’s a trap.

  53. Haven't tired this but one thing I used to do as a kid was keep starting at the blackest area of my room when I'm about to go to sleep when the lights were off (but you'd still get a little light from the window). If I tried to not blink while doing that, slowly that darkness would start to expand until the entire room looked pitch black. Once I shifted my eyes to look at other things it would go back to normal.

  54. the seam in a gas station coffee cup should be on the opposite side of the drink spout in the lid to help reduce potential drips

  55. Shrimp live in the canopies of the Redwood Forests. They get there via literal seagull poop, and the lush coastal ecosystem forms little puddles on the branches in which they grow and live.

  56. Hawaiian pizza was invented by a Greek immigrant living in Canada who was inspired by Chinese cuisine to put a South American fruit on an Italian dish and named it after Hawaii.

  57. Multisensory aphantasia is the absence of any sense within the mind. Research in the area has exploded with the last 10 years. People with aphantasia had no idea others could see/hear things in their minds.

  58. If you search for 'recursion' on Google, it will ask you if you meant to type 'recursion' instead. When you click the suggestion, you land on the exact same page and Google will ask you if you meant to type 'recursion'. Fun little easter egg

  59. One of my teachers was a finalist. She was so sad she wasn't chosen, then so happy she wasn't. I'm certain there was some survivor's guilt in that, but I was in sixth grade, so I didn't ask.

  60. If a bald eagle loses a feather, it sheds the same feather on the opposite side of its body to stay perfectly balanced in flight.

  61. When a Camel spider (or wind scorpion) is chasing you, it's just chasing your shadow. All they want is a little bit of shade! They'd never have the intent of harming you

  62. Due to evolution, humans share genes with all living organisms. For example, 60% of your DNA is the same as a strawberry.

  63. Hyenas are actually more related to cats than dogs. Hyenas are part of the Suborder Feliformia along with cats.

  64. Barnacles have the largest penis to body ratio of any creature alive on this planet. Do with this info what you will

  65. The ingredient tetrahydrozoline is the culprit. It can cause sleepiness, low heart rate, and low blood pressure if ingested. Children are particularly at risk because they're small, so it takes less of the substance to cause serious harm.

  66. Ya the science is pretty neato. Basically, no knead doughs differ from normal doughs in that they have a lower yeast amount, a longer fermentation cycle, and a higher water percentage. The lower yeast amount makes it so the dough doesn't over proof in it's long fermentation cycle. While the higher water percentage makes it easier for the gluten to form naturally from the fermentation action. If you don't need a loaf of bread the day of, doing a no-knead style the night before is super easy and creates amazing bread.

  67. There are penguin prostitutes that will have sex in exchange for rocks which they build their nests with. Sometimes they don't have sex, they trick their victim and just take the rock and run

  68. There was a NASA scientist during Apollo 13 who went into labor. Before she was dragged to the hospital she took a print out of some problem they couldn’t solve. She solved it while at the hospital.

  69. If you log into your Netflix account in a web browser, you can reset your viewing history for certain shows and watch the series again without messed up start/end times

  70. There’s a vast difference between a million and a billion. A simple way to visualize it: a million seconds is over 11 days. A billion seconds is just under 32 years.

  71. For money, the example given is typically, paraphrased... Let's say everyone is on a staircase and each step is $100k of net worth.

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