Play-Doh was first manufactured as a wallpaper cleaner.
122
160 cars can drive side by side on the Monumental Axis in Brazil, the world's widest road.
39
Stilts were invented by French shepherds who needed a way to get around in wet marshes.
45
Cash machines are as dirty as public toilets.
174
People spend about two weeks of their lives at traffic lights!
159
The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
244
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
Oak trees can live 200 or more years.
61