Via YouTube

This article first appeared on 9.15.17.


Via YouTube

Via YouTube

Cavemen must have been perpetually late, given that humans didn't get around to inventing the sundial until 1500 BCE. The first attempts at measuring time via sun movement were shadow clocks created by the Egyptians and Babylonians. These led to the sundial, an instrument that tells time by measuring shadows cast by the sun on a dial plate. Sundials were our preferred method of timekeeping until the mechanical clock was invented in 14th-century Europe.

Keep Reading Show less