1. The TNA-Family of Nucleic Acid Systems: Properties and Prospects

   • Albert Eschenmoser

   OriginalPaper Pages: 277 - 306

2. Causation and the Origin of Life. Metabolism or Replication First?

   • Addy Pross

   OriginalPaper Pages: 307 - 321

3. A Universal Definition of Life: Autonomy and Open-Ended Evolution

   • Kepa Ruiz-Mirazo
   • Juli Peretó
   • Alvaro Moreno

   OriginalPaper Pages: 323 - 346