How many rivets and bolts hold together the wings of a Boeing 777 plane? Why does an astronaut's space suit have a layer of liquid-cooled underwear? Who puts jelly in donuts?
How does the body protect itself from infections? Are you taller at the beginning or the end of the day? What makes your tummy rumble?
What causes a steam train to make its "chuff-chuff" noise? How many steps are there to the top of the Empire State Building? Why do swimming pools on board ocean liners have to be drained in rough weather? DELVE INTO THE DETAILS OF THESE AMAZING BUILDINGS AND MACHINES TO FIND OUT!
This witty and insightful book gathers together all the facts, figures and formulae we only half-remember from school, and is guaranteed to have you exclaiming, 'I used to know that!'