How do we know what people in earlier times knew? The Antikythera mechanism is an ancient mechanical computer designed to calculate astronomical positions. It is thouight to have been constructed in the or century BCE.
Autumn Colors ~ The astronomical clock on the St. Paulus-Dom Cathedral in Münster, Germany. Unlike modern clocks, the Münster clock is divided into 24 hours, runs counterclockwise, and indicates hours and minutes simultaneously.
Close up of the grasshopper. The grasshopper is connected to the pendulum. As ti swings back and forth. the pallets engage and disengage the 60 tooth escape wheel. The pallets are the levers seen mounted to the grasshopper's tail and back legs.