We cannot see the wind because air is homogenous and transparent. Wind does not reflect or block the light arriving at the eyes of a human being. We can only feel the presence of wind by the movement of thins around us like the trees, clouds and our bodily hairs.
when we see a tree is swaying
No, pigs cannot see the wind.
Wind.
Moving air or wind is difficult to see. The motion of atoms can not bee seen with the unaided eye. One can not see the motion of tectonic plates. In these examples, the phenomena are not visible but one can measure them.
No, you cannot see the wind itself, but you can see its effects, like the movement of the trees as it blows through them.
you cannot see the wind. just what it pucks up an the damage it does.
This is comparable to the wind, in that you can't see it, but you know it is there. You can conclude that there is something, for example, by watching trees or other things moving in the wind. In the case of a black hole, the effects of its gravity can be seen quite clearly.
If something is in the wind, you can't see or sense it yet, but you know it's there, like you know the wind is there even though it's invisible.
You can feel wind. You know it is there even if you can't see it. You might also look out the window and observe if any leaves on nearby trees are moving. It is likely that you can hear the wind if it is very strong, so use these senses.
air
Vampires are not real. Therefore you cannot see them
There are many things your eye cannot see, starting with the inside of your eye. You cannot see the wind, nor can you see ghosts, spirits or entities. Also, nobody ever gets to see their own face, just their reflection.