Dr. Cassandra Extavour is a Professor of Organismic and Evolutionary Biology and Professor of Molecular and Cellular Biology at Harvard University. She is examining the evolution of embryonic development to understand how genes direct cells during development to become different kinds of cells. She is also passionate about music. Cassandra enjoys listening to music and is a professional singer as well. Other activities that occupy her free time are dancing, hosting parties (pre-COVID), and cooking.