Do you ever look up at a cloud and think, where do those come from again? Do you know your molluscs from your mammals and your rocks from your minerals? Have you forgotten what the non-edible version of the Milky Way is, and did you ever know what a force was?Why Don't Things Fall Up? will gently remind you of everything you definitely learnt once upon a time, but have somehow forgotten along the way. If you've ever changed the subject when your child has asked for homework help, if you have the curiosity of a seven year old yourself, if you know everything but have forgotten the basics or don't want to know anything except the basics - then this is the book for you!