I Want To Know: How Does A

Square Astronaut, Round Hole. But Somehow, I'd Managed To Push Myself Through It, And Here Was The Truly Amazing Part: Along The Way, I'd Become A Good Fit. It Had Only Taken 21 Years.

Remember, Nobody Changes The World On Their Own.

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.

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

It's Almost Comical That Astronauts Are Stereotyped As Daredevils And Cowboys. As A Rule, We're Highly Methodical And Detail-oriented. Our Passion Isn't For Thrills But For The Grindstone, And Pressing Our Noses To It.