I have been interested in and studying skeletal tissues since my undergraduate days in Australia in the 1960s. Those early studies on the development of secondary cartilage in embryonic birds, first published in 1967, have come full circle with the discovery of secondary cartilage in dinosaurs12. Bird watching really is flying reptile watching. Skeletal tissue development and evolution, the embryonic origins of skeletal tissues (especially those that arise from neural crest cells), and integrating development and evolution in what is now known as evo-devo have been my primary preoccupations over the past 50+ years.