You can see full discussion with Richard here:    • Richard Dawkins: Genes Are Digital In...  

Dr. Sol Spiegelman was a researcher studying the evolution of RNA in the test tube. His work, and the experiments building on his work, have helped us make sense of gene-level evolutionary dynamics from the ground up.

Here's a link to the paper 40 years of in-vitro evolution: http://rpdata.caltech.edu/courses/Evo...