Sound travels better along the ground than in the air. Therefore, in order to hear the sound of the hooves of the approaching rider from afar, they put their ear to the ground. Why do you think snakes lost the hearing organ characteristic of their lizard ancestors?
Snakes don’t even have a tympanic membrane, but they do have a middle and inner ear. They have developed seismic hearing, that is, the ability to perceive sound waves that propagate not in the air, but along the ground or in water. Therefore, the snake does not react in any way if someone is talking loudly next to it, but it will instantly alert if someone takes a step, even far from it and even very carefully, “like a cat.”
There is evidence that the ancestors of snakes once lived in a land where it was easy to damage the eardrum. Hearing as well as sight underground is not needed. Therefore, everyone who lives in the soil loses sight and hearing. The bone that transmits the vibration of the membrane in the snake is connected to the lower jaw, so snakes do not hear sounds transmitted through the air, but distinguish sounds propagating in the soil.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.