Since before the dawn of civilization mankind has been fascinated bu the origin of the world in which we live. One of the most impressive and major triumphs of the human mind concerns the recognition that nature operates by regularities. It set humanity on a quest of thousands of years to unravel the secrets of the cosmos. Sophisticated instruments for controlling and following the laws of nature have been built and invented. Amongst the first and most fascinating examples is that of Stonehenge, mastering the Sun's annual path along the skies. A forerunner of far more advanced computers. Starting with the mysterious ancient Greek astronomical computer, the Antikythera mechanism, and culminating in present day supercomputers allowing us to understand the formation of structure in our Universe in the aftermath of the Big Bang !