Researcher Martin Sweatman from the University of Edinburgh has made a significant discovery at Gobekli Tepe in southern Turkey, identifying what he believes to be the oldest calendar of its kind. The calendar, featuring V-shaped markings, records a major astronomical event that had a profound impact on Earth. Sweatman asserts that the carvings tell the story of a comet strike around 10,850 B.C., which led to a 1,200-year ice age and the extinction of many large animals. This event may have also influenced human lifestyle and agriculture, contributing to the rise of civilization. Sweatman's interpretation of the V-shaped symbols as a solar calendar led to the conclusion that ancient people were able to record their observations of the sun, moon, and constellations. This discovery sheds light on the importance of the comet strike to these ancient people. Sweatman's research challenges previous skepticism and suggests that ancient humans had a sophisticated understanding of the cosmos and were able to mark the passage of time and changing seasons.