The First Scientist-Explorer Pytheas of Massalia  (fl. late 4th century BCE) stands as one of antiquity’s most enigmatic figures, an explorer, astronomer, and geographer whose reach extended far beyond the intellectual and geographic boundaries of his time. At a moment when most Greek thinkers conceived of the Earth as a narrow, temperate band of civilization surrounded by impassable extremes, Pytheas undertook a voyage  that radically expanded the Greek worldview. Sailing  f