Hills of the round earth

Intrigued by the name given to the mountains in the horizon, “the Hills of the round Earth”, Moko ventures off to see if the Earth is, in fact, round. An old wise man tells him that yes, if he were to walk in a straight line he could very well go all the way around the earth and come back to his starting point. Moko does as he is told and travels all the way around the Earth and returns back to his village, but since he didn’t have the feeling that he was walking around a sphere, he continues thinking that the Earth is flat.