Read the fascinating history of how an ancient Cyrenian man calculated the circumference of the Earth using only a stick

 https://notthebee.com/article/read-the-fascinating-history-of-how-an-ancient-cyrenian-man-calculated-the-circumference-of-the-earth-using-only-a-stick?fbclid=IwAR3XIBFSkbZJndkxFtOuiQyTo19jHyVg5HyLvps87uLpO3jIQYiWAdkx2xU