2023Pioneers of Slovene Aviation - Edvard Rusjan - First Day Cover

Flight is one of the most important phenomena of life on our planet and is around 150 million years old (the Archaeopteryx genus of bird-like dinosaurs). It has existed throughout every period of history, with or without human involvement. Since nature deprived man of wings, he has had to rely on engineering. The flight of birds was for a long time an inspiration for human endeavours in this direction, until because of its impossibility it became more of an obstacle than a model.