The urge to explore has propelled evolution since the first water creatures reconnoitered the land. Like all living systems, cultures cannot remain static; they evolve or decline. They explore or expire . . .

Mars is there, waiting to be reached.

A lot of times when you just don’t want to think about something, when there is nothing you can do and the waiting is just unbearable, it helps to demand a lot from yourself, to do or learn more than you thought you could, and just let your concentration get you through the bad time.