As Artemis II gets ready to launch, NASA prepares for longer journeys into space. We look at what space travel does to the human body with Scott Solomon, an evolutionary biologist and professor at Rice University, and the author of Becoming Martian: How Living in Space Will Change Our Bodies and Minds, and Susan Bailey, a professor and radiation cancer biologist in the Department of Environmental and Radiological Health Sciences at Colorado State University. »»» Subscribe to CBC News to watch