An Extraordinary Astronaut
As of 2020, fewer than 600 individuals have left Earth to experience work and life in space. That number will grow as government-funded and commercial space programs move forward in countries around the globe. There are however major questions about how humans respond to spaceflight at every level, from the whole body to individual organs to specific cells to molecular pathways. Preparing for a future where longer-duration spaceflights are anticipated and people can begin to contemplate space tourism, researchers are studying astronauts to understand how the human system is affected by and adapts to space. Lara Szewczak got a window on this world, speaking with retired astronaut Scott Kelly about his late-blooming interest in science, what he's learned through the NASA Twins Study, and why space vacations might not be for everyone. They were joined by Chris Mason, a lead investigator looking at the 'omics of spaceflight. Excerpts from this conversation are presented below, and the full conversation is available with the article online.