Endurance: A Year in Space, A Lifetime of Discovery

by Scott Kelly

What is it worth to see two former bitter enemies transform weapons into transport for exploration and the pursuit of scientific knowledge? What is it worth to see former enemy nations turn their warriors into crewmates and lifelong friends? This is impossible to put a dollar figure on, but to me it’s one of the things that makes this project worth the expense, even worth risking our lives.

Only male astronauts have suffered damage to their eyes while in space, so looking at the slight differences in the head and neck veins of male and female astronauts might also help scientists start to nail down the causes. If we can’t, we just might have to send an all-women crew to Mars.