John Glenn: A Realm Where Age Doesn't Count

This is no country for old men, so John Glenn will be leaving it in October--will quit the entire planet and head out for a realm where age doesn't count. Oddly, it was the realization that young people go through the process of aging in space--cardiovascular shifts, immune-system changes, loss of muscle and of bone density--that gave Glenn his long-sought means of getting back to the extra-world that made him. What was a usable scientific rationale for him became a new way to understand space for others. If the young temporarily grow old out there, then space is for the ageless,...