Ch. 2. What is Earth life?
Ch. 3. Life as we do not know it
Ch. 4. recipe book of life
Ch. 5. artificial synthesis of life
Ch. 6. Are there aliens already on Earth?
Ch. 7. Panspermia : why there may be aliens throughout the solar system
Ch. 9. Fossils on the Moon
Ch. 13. Implications, ethics, and dangers
Ch. 14. manifesto : send paleontologists to Mars and biochemists to Titan
Envoi : a forest of life?
