The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
244
Sunflowers can be used to clean up radioactive waste.
17
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
At the time of your birth, you were, for a few seconds, the youngest person on the planet.
30
Babies who wear disposable diapers are five times more likely to develop diaper rash than those that wear cotton diapers.
39



