1. A. Einstein in Festschrift für Aurel Stodola E. Honegger Ed. (Orell Füssli Verlag Zürich 1929) p. 126.
2. Etiology is the science of causes or origins ( Webster's New 20th Century Dictionary of the English Language Unabridged ed. 2 s.v. “etiology”).
3. RNA not DNA is to serve as a reference structure for choosing alternatives because biological as well as chemical reasoning indicates that RNA preceded DNA in biological evolution [see for example G. F. Joyce and L. E. Orgel in The RNA World R. F. Gesteland T. R. Cech J. F. Atkins Eds. (Cold Spring Harbor Laboratory Press Plainview NY ed. 2 1999) p. 49].
4. For an alternative view see for example S. A. Kauffman The Origins of Order: Self-Organization and Selection in Evolution (Oxford Univ. Press Oxford 1993).
5. Eigen M., Naturwissenschaften 58, 465 (1971);