This book establishes the Vedic Science of Time, the rules of which are revealed for the very first time, and also establishes the true timeline of World History by examining and corroborating the ancient genealogies with known natural phenomena such as Solar & Lunar Eclipses and the Heliacal Risings of Venus and Sirius. The true timeline of five most ancient civilizations on Earth, that of Vedic India ( 3400 BCE), the Indus Valley ( 3300 BCE), Egypt ( 3100 BCE), Mesopotamia ( 2580 BCE) and the Biblical Hebrews ( 1740 BCE), has thus been established. It's also established that almost all these civilizations used the Vedic Calendar and have their ultimate origin in the Vedic Indian civilization. The dates of two great historical epics of India, that of Ramayana (1299 BCE) and Mahabharata (827 BCE), have also been established once and for all. Like a ray of light removes the darkness of ages, this book clears the reigning confusion on ancient history.