We are not the first civilian that lived on this planet. There have been others and clues about them are in many ancient texts. Not aliens. Humans from earth who colonized the solar system and left us primitives behind. Some are still around here and there. Most eventually met their demise in the cold vaccuum of space. Only a few remain today. The age of noah approaches again...
Looking at the pictures of the pyramid, it looks like there are several other white spots there.