The thirst for adventure, for power, for wealth fueled the age of exploration by sea. This required the building of bigger and better ships, whose ability to judge where they were depended on the construction of accurate instruments, including the clock. This program covers the distance between Melville’s Moby Dick and Jules Verne’s 20,000 Leagues Under the Sea, from fear and superstitition to confidence that the sea can be mastered by technology—and to the reality, which lies somewhere in between. (26 minutes)