For decades we have enjoyed stimulating conversations, co-authorship, and the deep reading of David S. Thaler. A protege of Joshua Lederberg, David spent many years at The Rockefeller University and is now based at the Biozentrum – Center for Molecular Life Sciences in Basel, Switzerland. David now rejoins RU as a guest investigator with PHE, and mutual interests spanning evolution, barcodes, Leonardo, and more. Welcome, David.