look at the shadows the wings of the building cast on itself and how they move.
https://www.usap.gov/videoclipsandmaps/SouthPoleWebCam/spoleslide00022.jpg
look at the shadows the wings of the building cast on itself and how they move.
https://www.usap.gov/videoclipsandmaps/SouthPoleWebCam/spoleslide00022.jpg