The Protein-RNA world

A good colleague of mine, Marc Marti, sent me this article by Sidney Altman, which I find very inspiring. I enclose here the abstract


Following the naming of the RNA World for the hypothetical biochemical world during very early life forms, the current world was named the Protein World. However, the astonishing high level of transcripts from virtually all chromosomes in an organism now found in eucaryotes, as well as their extensive roles in regulating gene expression, suggests that today’s world should be labeled as the RNA–Protein World.