In the second half of this captivating episode, Dr. Hassan Tetteh continues his fascinating conversation with Dr. Christyl Johnson of NASA's Goddard Space Flight Center. Dr. Johnson delves deeper into NASA's preparations for long-term space missions, including the transition to green fuels and the critical importance of holistic healthcare approaches for astronauts. She emphasizes the need for a comprehensive understanding of human health in space, touching on challenges like bone density loss and cardiovascular changes in zero gravity. Dr. Johnson also highlights the potential of digital twins and AI in revolutionizing personalized medicine, both for space travel and on Earth. The discussion concludes with an inspiring outlook on the future, as Dr. Johnson shares her excitement about engaging young minds in these ambitious space exploration goals and the potential for groundbreaking innovations in healthcare and technology.