Fly as in what birds and aeroplanes do, fly as in the insects, or fly as in “your fly is down”?
edit: I mean the word fly (as in its use in language), not the act of flying!
Fly as in what birds and aeroplanes do, fly as in the insects, or fly as in “your fly is down”?
edit: I mean the word fly (as in its use in language), not the act of flying!
Depends on the scale. Really tiny microorganism living in the air do not fly, as in they have no active mecanism to physically interact with their environment to move in any way. They just follow the air currents at seemingly random (the exact word is brownian), kinf of like particles of dust that you see in a ray of light. It is not defined as flying and not studied as such