How Long is a Metre?

The video explores the evolution of length measurement, starting with body-based units like the foot and cubit, which varied widely. Ancient Egyptians standardized the cubit to aid construction. By the 18th century, France had numerous units, complicating trade. The meter was introduced as a universal standard, initially defined by Earth's dimensions and later by light speed in a vacuum.

What was the method used to calculate the meter's length?

How is the meter defined in modern times?