Did you know that...

... to escape the traffic in São Paulo increasing numbers of people resort to travelling by helicopter? On average, 400 helicopters fly around every day. It is the busiest stretch of sky in the world.

... in São Paulo, there is a 40-million-year-old 140-metre-deep meteorite crater where 25,000 people live, and in general, in the city with 150 libraries, it is said that there are more rats than inhabitants (estimated at eight to one): they must love books!