https://medium.com/@michael.l.robinson/a-dog-walks-into-a-bar-the-bronze-age-joke-that-isn-t-a-joke-at-all-635cd8958a24

This joke comes from ancient Sumer, a civilization that was ancient even to the Babylonians and Egyptians, older than the first dynasties of China. It’s a 4,000 year old joke as reported in this piece from WBUR — some of the humor has maybe gone stale over time.