When you get laser tattoo removal the ink doesn’t disappear, you pee it out. Your body’s immune system breaks down the pigments of ink and it flows in your blood stream, gets processed through your kidneys, then you pee out the ink.

Our brain filters out a lot of what we see along with just straight making s**t up based on extrapolation.

Bodies will move as they’re coming out of rigor. I’ve been bumped by a few (I’m a coroner). Bodies can also make sounds as the remaining air/ gas leaves… 2am in the morgue and I thought I was in COD zombies.

Human beings are a cesspool of bacteria and when you die your body eats itself from the inside out.

Your intestines "know" what shape they're supposed to be in, and can move themselves, which means gut surgeons can just stuff them back into you when they're done and they'll sort themselves out.

A dead body will often move as its being cremated. Muscles contract as they cook, after all. Sometimes this means a body will sit up in the crematory machine.

Your tongue has **incredible** tactile capabilities. So much so, that if you look at any object, you can vividly imagine what it would feel like to lick it. Go ahead, look at the wall, your shirt, your shoe—the tongue knows.

There is an urban myth that your fingernails continue to grow after death, which is supposed to explain why dead bodies often appear to have long nails. The truth is that the soft tissues in the fingers and hands tend to contract as they lose moisture, leading to the *appearance* of growing nails.

Food that was consumed can sometimes take up to 5 days to fully pass through your intestines into your colon. So when people say that you are full of s**t, they ain't lying.

The pain you feel from a sunburn is your skin cells effectively killing themselves before they mutate into cancer.

Incident number 1: I had a bad enough broken bone when I was 9 that it almost killed me. Apparently the marrow that makes blood can't exist in your bloodstream, fun fact lol.

The liver can grow parts of itself back.

People keep saying "your brain" in these comments. I think one of the creepiest things is that you are the brain and the brain is you, but for some reason we brains really don't like to acknowledge this.

The intestines are covered by a double "fleece" of peritoneum. See it like a blanket. When your intestines get damaged for whatever reason, this blanket starts moving out of itself and crawling upwards towards the place which has the injury. It will stay there until the injury is recovered. And then move on again. Maybe not the most creepy fact, but definitely interesting in my opinion.

Allegedly, your immune system has no clue your eyes exist. Effective tomorrow, if your immune system found out about your eyes it would treat them as a external threat. Therefore try and neutralize your eye balls leaving you blind.

You can become allergic to yourself.

Human skin is overlaid with a pattern called Blaschko’s Lines, stripes covering the body from head to toe. The stripes run up and down your arms and legs and hug your torso. They wrap around the back of your head like a hood and across your face. You just can’t see them.

You can grow tumours with hair, teeth, and eyes but no heart or brain.

If you wear a glass which vertically inverts your vision long enough, your brain will correct it and you'll see things normal. But when your take those glasses off, everything will look upside-down again until brain recalibrates again.

The front of your tongue is curious, constantly patrolling, and autonomous. It chases the dentist around your mouth and you aren’t even aware of it. So embarrassing and weird/creepy.

The brain will always/usually try to ensure it’s survival, if knocking you out does so, then you will faint for the safety of the brain I remember finding this once but I don’t remember clearly.

Viewed from a medical standpoint, the inside of your gastrointestinal tract is technically the outside of your body, making you a meat donut.

There's countless ways it can just... *go wrong*. Just, out of f*****g nowhere, completely unexpectedly, something can become f****d up in a way which is anything from life-alteringly debilitating to lethal.

How limited our minds are. An ant will never understand that being in my room when I'm vacuuming is a bad idea, but the knowledge exists. I'm sure there's a butt load of information about the universe staring right at us but we'll never understand it because of our stupid human brains.