Miles de millones

English Translation: As it indicates his subtitle? thought of life and death in the waiting room of the millenium -, Thousands of million are a collection of tests in the author, besides to approach matters so scientists as the mathematics or astronomy, offers their opinion on as present subjects as the abortion. Without it lacks a dedicated space to explain his skepticism on the existence of God. In his route, Carl Sagan takes to his readers in his exciting trip that begins with the invention of the chess, it happens through the possibility of life in Mars and arrives until the cold war and the heating from the globe