Geography & Earth System Science ()

We travel together, passengers on a little space ship, dependent on its vulnerable reserves of air and soil; all committed for our safety to its security and peace; preserved from annihilation only by the care, the work, and, I will say, the love we give our fragile craft. We cannot maintain it half fortunate, half miserable, half confident, half despairing, half slave—to the ancient enemies of man—half free in a liberation of resources undreamed of until this day. No craft, no crew can travel safely with such vast contradictions. On their resolution depends the survival of us all.

History is philosophy teaching by example, and also warning; its two eyes are geography and chronology.

Ptolemy's Geography is the only book on cartography to have survived from the classical period and one of the most influential scientific works of all time.