Someone said that the moon and the earth were different.
I do not think so, since we know that the earth is composed of so-called atoms, in case you flat-earthers have heard of them. The moon is made of matter (unless, of course, it does only exist in our minds) - atoms, as well as the earth. How come that the moon, being made of matter, has gravitation and the earth does not?
Do not give me that "there is a difference between snakes and other legged animals" - it is not relevant. All animals are still made of organic material and most animals have a way of moving themselves. Snakes as well. The legs are just details, in other words, unimportant. Just like the fact that there are rivers on Earth, but not on the moon.