‘Lunar calendar’ found in caves may predate equivalent record-keeping systems by at least 10,000 years
A primitive writing system used by ice age hunter-gatherers appears to have been uncovered by an amateur archaeologist, who concluded that the 20,000-year-old markings were a form of lunar calendar.
The research suggests cave drawings were not only a form of artistic expression but also used to record sophisticated information about the timing of animals’ reproductive cycles.
