Your body needs sleep. Staying awake for two weeks can be enough to kill you.
People who lose an arm or leg in an accident or operation can often still feel it hurting, aching or itching but can do nothing to make it feel better.
Air you swallow, and gas released from food as you digest it, comes out as a burp or a fart – which one depends on how far through your intestines it has got.
When you die, the bacteria in your gut start to eat away at you from the inside.
The mental disorder called ‘walking corpse’ disease leads people to believe parts of their body are missing or that they are dead.
There is enough iron in the human body to make a nail.
People who live in big cities make more ear wax than those who live in the country, where the air is cleaner.
A shark can taste blood over a kilometre (about half a mile) away.
In Palestine 8–9,000 years ago, a dead relative was buried under the floor of the family’s house – except the head. The flesh and brain were removed from the head and the skull used as the base for a plaster mould of the person’s head, which was decorated and kept.
Anyone who rebelled against the Mesopotamian king Ashurnasirpal could expect to be skinned or buried alive. We know this because he buried some rebels inside a column and carved the story of their crime on the outside.
The servants of a dead Egyptian pharaoh were often killed and buried with him or sealed alive in his pyramid.