On April 23, 1992 a major science story appeared in newspaper headlines around the world. The announcement of the discovery of small-scale fluctuations in the cosmic microwave radiation, ripples in the cosmos, was a bolt from the blue, taking most of the world's cosmologists by surprise. Then came the first reactions: 'the discovery of the century, perhaps of all time' (Stephen Hawking), 'the Holy Grail of cosmology', 'English does not have enough...