Mysterious structures on the dark side of Moon and Mars may be constructed by the same race, they live in glass domes, or domes are built underground. Atmospheric refraction near the horizon moon, interpreted as sunlight refracted through the remains of the dome.
A number of authors, has elaborated extensively on the evidence of ancient civilization on the dark side of Moon and on Mars, and perhaps elsewhere in the same solar system. Moon seems never to have an atmosphere, people may have come from somewhere else and an explanation of the simplest and most likely: that all the mysterious structures on the dark side of Moon and Mars was built by the same race. They may have come from Mars or Earth may have come from past civilizations. At least some UFOs may come from the Mars and the dark side of Moon.