One of the greatest achievements has been to develop a narrative, based on science, that leads us in an uninterrupted way from the beginning of the universe to the contemporary era. In this book, members of El Colegio Nacional, and invited specialists take us by the hand on a journey through time and space that goes from the moment of the big explosion —13,800 million years ago—, the formation of stars and galaxies, the Milky Way, the solar system and the planet Earth to the civilizations of the present. This path goes through the evolution of the chemical composition inside the stars, through the formation of the Sun and its planetary system, and through the appearance of the first forms of life on Earth.