Shifting ground
A leaf from a liturgical book (Sacramentarium Gelasianum) written in a particular type of script known as 'Rhetian' (typical of the Eastern Alps), St. Gallen, Stiftsbibliothek, Cod. Sang. 350
Natural reproduction is never about creating perfect copies. Far from it, evolution gives rise to genetic drift, a process through which the genetic pool in small p…