How did life begin on Earth, and when did it happen?
Are there other worlds where life could have started?
What improvements have we made in the ability to discover life on other worlds?
Will we find signs of life in the galaxy? What about intelligent life?
In the last 20 years, advances in the studies of astronomy and the origins of life are now bringing this fascinating possibility of finding life outside the Earth from a science-fiction theme into scientific mainstream reality.