The English physicist Isaac Newton had a bit of thing about the number seven; so convinced was he that it was the number God had chosen to order the universe, that he looked for it everywhere. He was convinced that the Sun had seven planets, that the rainbow was made up of seven colours and that the number seven was at the heart of all creation.



Unfortunately, any five year old will ask the question ‘Isn’t indigo just dark blue?’, and put a hole through his argument. Of course it is… Continue