As I Have Discovered Again And Again,

Other Anatomical Changes Associated With Long-duration Space Flight Are Definitely Negative: The Immune System Weakens, The Heart Shrinks Because It Doesn't Have To Strain Against Gravity, Eyesight Tends To Degrade, Sometimes Markedly (no One's Exactly Sure Why Yet). The Spine Lengthens As The Little Sacs Of Fluid Between The Vertebrae Expand, And Bone Mass Decreases As The Body Sheds Calcium. Without Gravity, We Don't Need Muscle And Bone Mass To Support Our Own Weight, Which Is What Makes Life In Space So Much Fun But Also So Inherently Bad For The Human Body, Long-term.

"what's The Next Thing That's Going To Kill Me?" Is A Mantra For Pilots And Astronauts.

Do Your Homework In Advance About The Actual Travel Details So Transportation Issues Do Not Define Your Holiday.

When You Have Some Skills But Don't Fully Understand Your Environment, There Is No Way You Can Be A Plus One. At Best, You Can Be A Zero. But A Zero Isn't A Bad Thing To Be. You're Competent Enough Not To Create Problems Or Make More Work For Everyone Else. And You Have To Be Competent, And Prove To Others That You Are, Before You Can Be Extraordinary. There Are No Short-cuts, Unfortunately.

Loneliness... Has Very Little To Do With Location. It's A State Of Mind. In The Centre Of Every City Are Some Of The Loneliest People In The World... Because Our Whole Planet Was Just Outside The Window, I Felt Even More... Connected To The Seven Billion Other People.