It is very hard to believe the presence of Extra Terrestrials but there are many incidents that took place on our Earth to which experts have no answer. This book contains some of those incidents that can proof the presence of extra terrestrial and their connection with our world over centuries.This book contains real facts from past which can prove the connection of extra terrestrial and ancient world. This book also contains the relation between extra terrestrial and some of the great personalities of past like Leonardo Da Vinci, Sir Albert Einstein. I, the author of this book am sure that after reading this book some of readers will start believing in the presence of Extra Terrestrial. This book contains descriptions of some real unsolved sightings in the sky by the common people and army.