The search for alien life

Table of Contents Early daysHello? Is anyone out there?Looking for life on MarsThe ocean moonsLife

Are we alone?

The desire to know our place in the universe is a core human yearning, and people have pondered the question for thousands of years. Indeed, hundreds of years before the birth of Christ, Greek philosophers such as Anaximander and Epicurus speculated that the cosmos is teeming with planets, many of which may support life.