Were the Mayans Aliens?

The many surprisingly advanced civilizations in the New World boggled the mind of the first Europeans that arrived. How could these savages construct amazing buildings and maintain an advanced social structure, when they didn't even know about God? Wild theories were soon introduced to explain the mystery. The most common theory, and one that you will still hear, is that early Europeans or Egyptians must have visited the New World centuries earlier, bringing their wisdom and knowledge. Even though we do know that parts of the New World were indeed visited before Columbus, it is more likely that civilizations developed independently on different continents. In modern day, this there's no way they could have done this themselves theory has prevailed and, in some cases, evolved into absurdity. Some people actually believe that the Maya, along with the builders of the pyramids in Egypt and the Nazca lines in Peru, must have received other-worldly help. Do what you want with that theory, but the truth is there are lots of mysteries involving the Maya. Not only did they construct amazing temples in perfect geophysical alignment, they also made roads between cities. These roads are called sacbe, which means white road. Like so many other features of Mayan culture they remain a mystery. They are perfectly straight, even between cities quite far apart. They are raised, built on a platform, and paved with white stone. At times reaching 10 meters in width, the sacbe seem suited for wagons and heavy traffic. However, the Maya knew of but did not utilize the wheel and there weren't any big mammals in the Mayan world before the Spanish brought the horse. The grandeur of the sacbe was most probably due to ceremonial purposes.