30 sad but true facts to add to your knowledge bank (31 photos)

It's probably better not to talk about some things. For example, about how many dust mites live on your bed, or about the fact that a person is able to bite off his own finger. A blogger with the nickname The Facts Guy collects just such alarming, but terribly entertaining facts.





1. More than 80 million bacteria can be exchanged in 10 seconds of kissing



2. As of 2019, there are over half a million homeless people in the United States. There are also 17 million vacant homes.





3. Another version of you exists in the minds of everyone who knows you.



4. Night time is the natural state of the Universe, day time is caused only by a nearby fireball



5. There is as much difference between 1980 and 2021 as there is between 1980 and 1939



6. If you become the number one centenarian in the world, during your life all of humanity will be renewed, except you



7. By law, cruise ships must have morgues for passengers. Someone inevitably dies on every trip



8. One tiger in Nepal killed 436 people in its life



9. Locked-in syndrome is a condition in which you can only move your eyes while the rest of your body is paralyzed. Essentially, you can go into a coma-like state and be aware of it



10. In a US government experiment, the Transportation Security Administration failed to catch 95% of guns passing through airports.



11. Sea scorpions once existed the size of a great white shark



12. Humans have enough bite force to bite off their own fingers. The only thing stopping us is our brain's natural defense mechanism



13. Hearing is the last sense that disappears before death



14. During World War II, Japan bombed China with fleas infected with bubonic plague.



15. Dogs like squeaky toys because they resemble scared or injured prey.



16. Genghis Khan significantly reduced carbon in the atmosphere because he killed many farmers and all their farms turned into forests



17. In the Victorian era, people photographed their dead relatives in realistic poses for memorial photographs. Photography was still so new and expensive that it was usually the only time in a person’s life that a person would be photographed.



18. There are more than 200 dead bodies on Everest, and they are used as waypoints for climbers.



19. In the 1930s, parents often “walked” their children in cages outside the windows



20. Thanks to pregnancy, the average number of skeletons in the human body is more than one



21. More than 50% of commercial pilots admitted to falling asleep while flying.



22. Almost everything we can measure on Earth is contaminated with microplastic particles



23. Cannibalism is common in hamsters



24. There could be up to 10 million dust mites on your bed.



25. Survival rate for out-of-hospital cardiac arrest is 1 in 10



26. Anthrax can be buried for hundreds of years and then reinfect people when the soil is disturbed.



27. If you live a full life, you will lose more than 45 kg of your skin.



28. People's overall happiness peaks at age 21 and doesn't return to that level until they retire.



29. During gladiator games in the Colosseum, spectators rushed onto the field to drink the blood of fallen gladiators. They believed that this way they would absorb their strength and skills at the same time



30. In ancient England, people used hollow skulls as bowls and cups