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Have you ever wondered why a windfall apple always falls down from the tree? Never up? Why, as the Earth spins, we do not fly off into space? Why light looks white but, in fact, is made up of many colours?

These and other deep questions fascinated the young Isaac Newton, a seventeenth century English eccentric, who went on to make amazing discoveries and became the greatest scientist the World has ever known. His curious childhood, his experiments at Cambridge (assisted by Diamond, his beloved but mischievous dog) and his battles with the Royal Society, form a tale told by the two ladies in his life - both called Catherine!