People Are Sharing 35 Not Fun Facts They Wish They Didn't Know

Between 10 and 20% of US adults are functionally illiterate (this does not mean they can't read or write at all, but that they cannot comprehend what they are reading at a high enough level to do many basic tasks, like filling out a form). To make matters worse a very large proportion of these people do not realize they have a problem with literacy and self report as being fine at reading and writing.

Migraines and strokes carry a lot of the same symptoms so if you suffer regular migraines you may not notice you're actually dying one day.

The reason you’re supposed to contact a doctor if you have an erection lasting longer than four hours is because prolonged priapism can lead to gangrene of the penis. Blood goes in, deoxygenates, but can’t leave, so there’s no way for fresh oxygenated blood to come in, causing the tissue to turn black and die.

Don’t worry, though! This can be treated by using a big syringe to suck the trapped blood out.

Spider - Rain (you read that right) is a real and naturally occurring phenomenon.

A third of the world's population live in areas that are projected to suffer extended periods of unsurvivable heat by 2070.

The reason dogs love squeaky toys is because they sound like small animals dying.

Bed bugs procreate by traumatic insemination. Males literally stab females with their genitals. So, just another reason to hate them then.

There is a mysterious illness called the 'sweating sickness' that hit in multiple small epidemics in the early modern era. It was incredibly contagious and massively deadly, with about a 50% average death rate, but it could be higher. It began with an ominous sense of apprehension, followed by severe pains in the neck and giddiness. They then abruptly stopped and switched to heavy sweating, headaches and delirium. Finally, the person was hit with an extreme urge to sleep, and it was thought to be fatal if you fell to it.

We know almost nothing about it, nothing about how it spread, how it was caused, only that if you got it you were either surviving or dead within 24hrs. There are horror stories of people leaving town on hunting trips and returning the same day to find almost everybody in the village dead, with only a few scattered survivors.

The worst thing was, you did not gain immunity. You could live through the sweating sickness once, and then get it a few days later and die. Or live through it two or three times, and then get it and die. It was horrific, and we don't know why it disappeared and we don't know if it will ever return.

The glaciers of the Antarctica shelves have melted (and continue to melt) at so fast a rate that even if we enacted radical and worldwide climate change laws today, it's going to take hundreds of years to recover them to their pre-industrial levels.

It was once thought for birds (parrots, magpies) to learn to talk, you had to release their tongue. This was done by cutting their tongue completely or partly off, of course without any anesthesia or pain killers. The tongue release plays absolutely no role in the birds' ability to talk.

There is a non-zero maximum threshold for the amount of cockroach that can be present in ground coffee because it is literally impossible to keep them out entirely.

In Australia there is a plant called the Gympie-Gympie which has such a severe sting that horses who brush against it throw themselves off cliffs because they’d rather die than continue to experience the pain

The threat of a deadly bird flu spreading to humans is always there. It takes just a little bit of negligence in screening chickens for this to happen.

A man once had a tapeworm get cancer. That cancer metastasized, and the man passed away from tumors of tapeworm throughout his entire body.

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