People are taller in the morning than in the evening. During the day, the weight of your body compresses your spine as you walk around, then when you are asleep it expands again.
There are more bacteria in your mouth than there are people in the world!
If you could lay out all the possible nerve connections in your brain, end to end, they would stretch to about 3.2 million kilometres (2 million miles).
There have been many cases of people spontaneously bursting into flames and dying. Often, their whole body is burned away. No one knows exactly why this spontaneous human combustion happens. What a way to go!
There are around 100 million microbes living in your mouth at any time. They feed on scraps of food and dead cells from your mouth.