This picture is placed into the public domain because it is a generative work based on the accumulated works of others.
A purple sky backdrops stark triangular shapes. The scene has no curves - only straight lines at sharp angles.
Coherent
“4th dimension” - weight 1
Short
882030
0.5
Off
Just as all phenomena exist in time and thus have a history, they also exist in space and have a geography.United States National Research Council