"This book deals with the origins of the human obsession with time and covers the cultures of prehistory and classical antiquity, analysing how the observation of the sky has given rise to festivities, religions or systems of power. Since ancient times, men have looked to the stars for the laws that govern the world, including the laws of the calendar that control the cycle of seasons and harvests. The prehistoric men gave themselves to discover the secret cycles of time engraved in the firmament and as a trace of this interest there have remained imposing megalithic constructions; from the mysteries of the sky, the Sumerians and the Egyptians extracted many of the gods from their pantheons; and Greeks and Romans built their myths trying to explain the enigmatic signs of the stars. Author: Juan Antonio Belmonte, researcher at the IAC and expert in archaeoastronomy. Collection ""Tanto por saber"", by Ediciones Temas de Hoy. "