We are so used to the blue of the sky that the last thing that comes to our minds is that without the atmosphere, we would see a black starlit sky even by day, together with the blinding white sunlight but no colours. None of us are aware of that precious layer of gas which lies around the earth’s crust and which gives us life until its vapour thickens and becomes clouds. Clouds and scenery: a theme which is worth exploration once again.