Dr. Anastasia Buyalskaya, a behavioral scientist specializing in habit formation, challenges the popular 21-day myth, revealing that habit development is much more complex and variable. She discusses the role of contextual cues and flexibility in creating lasting habits. The conversation also explores a fascinating link between left-handed musicians and unique brain pathways activated through musical training. Plus, they delve into cosmic concerns with bacteria aboard the International Space Station adapting and potentially threatening human health.