text: So... Until you can give a good explanation or opinion that aliens have made this, it is a natural landform.Growing up in the more modern times I see many things that would seem almost impossible to someone not born in this time. Cars are becoming more advanced than ever. Although they have their advantages, the use of cars also has many disadvantages. They polute the air and they can be very dangerous. The pros of cars are by far outweighed by the cons, if you look at them in the long run. Limiting car use could preserve the earth, relieve stress, and reduce the amount of overweight people in America .