More than 40,000 parasites and 250 types of bacteria can be exchanged in one kiss

The Romans used crushed mouse brains as toothpaste.

People can die with no discernible cause of death. This is known as Sudden arrhythmic death syndrome or SADS.

Approximately 2,500 left handed people die every year as a result of using equipment designed for right handed people.

The average mattress doubles in weight over the course of 10 years due to accumulation of dust mites and dust mite poop.

A human body could be skeletonized in less than four days in highly oxygenated deeper water, according to a study done by Simon Fraser University..

It would take approximately 400 humans to have enough iron to forge a sword from blood.

Around 4,400 unidentified bodies are recovered each year, according to NamUs. Subsequently, after one year, around 1,000 of those bodies still remain unidentified.

Certain species of male angler fish mate by biting a female angler fish so that his mouth fuses to her body.

Pigs will eat a human body, including bones, leaving only teeth behind.

Bodies decay very slowly underwater. Corpses recovered from bodies of water decay faster.

“Teratoma” or “monstrous tumors” are “evil twins” that can grow on your brain.

“Prosopagnosia” is the inability to recognize faces.