In Mary Roach's book "Packing for Mars: The Curious Science of Life in the Void," astronaut Frank Borman reflects on his experience during the mission to the moon. He openly confesses that he felt extremely unwell throughout the journey, aligning with fellow astronaut Eugene Cernan's description of him as "sick as a dog". This admission highlights the challenges faced by astronauts during space travel and the unexpected physical toll it can take on even the most prepared individuals.

Borman's honesty sheds light on the human side of space exploration, revealing that despite rigorous training and preparation, astronauts can still encounter significant difficulties. Their experiences underline the importance of mental and physical resilience in extreme environments, reminding us that the quest for knowledge and exploration is not without its hardships.