John Walton, from St. Andrews University, also wrote to the TLS challenging Fletcher’s specific scientific claims. Walton noted (1) that “intense laboratory research has failed to produce even one nucleotide (RNA component) under geologically plausible conditions”; and (2) that scientists had encountered “insuperable problems” in explaining the origin of the information that would need to be present in “the chains of nucleotides required for the RNA world.”
