Each culture developed separately from each other, a bit like a religion. They each formed their own opinion of the world, and because of lack of easy transportation, the myths and legends of each culture had years to develop before they were taken and told in different areas. For instance, why would Europe know of the myth of the Mouse and the Douglas Fir Cone, when they have no Douglas Fir trees? They didn't know that Douglas Fir cones look like they have mouse butts sticking out of them, so they didn't come up with an explanation for it. So they didn't know it until they came to America and were told the myth by the Native Americans.
In addition, people came up with different explanations for the same phenomena. Why would the Greeks think that Apep swallowed the sun, when they never heard of him? And why would they have heard of him, with little to no contact with the Egyptians who came up with the Great Snake?
And they would also be influenced by the nature of certain animals in each area. For instance, most Asian cultures have snakes as a wise animal, because they are less likely to attack a person than a snake from, say, Austalia, where many extremely poisonous snakes reside.
Sorry that this answer is so long - you just asked a loaded question.
Whose mythology? Every culture has their own Creation story.
Every generation and every historian and every political system sees history in its own way, so in that way, some history must be a myth.
Every country is rich in its own traditions and culture.
Yes, every culture has their own.
Pop has no culture, only that the americans or poeple has created a own style
every country have their own culture so they have their own sayings and mottos because they have their own beliefs
every country have their own culture so they have their own sayings and mottos because they have their own beliefs
Let Every Man Mind His Own Business was created in 1839.
Every Little Movement - Has a Meaning All Its Own - was created in 1910.
It depends on which mythology you are talking about. Every culture has their own gods.
Every culture has at some point created its own gods, whether by developing them from its own mythos or "borrowing" another culture's deities. Many societies have invented hundreds of gods to deal with every aspect of life where some have a single entity in charge of everything. Either way, over time they all add up.
they chose it by antique cultures because the Romans were created by to other civilizations: Greeks and other who's name I don't remember so they took part of every culture and create there own culture.