Here’s a thing I have never seen discussed, a small scientific mystery that perhaps our erudite readers might be able to shed some light on.
I was stuck at the weekend in a waiting room with nothing for company but a tank full of tropical fish. I watched them for half an hour or so. They seemed pretty happy; but the thing that puzzled me was, none of them ever seemed to pass gas.
Do they? Fish, I mean. Pass gas? It seems to me they ought to. I mean, they eat animal and vegetable matter, and process it in their little alimentary tracts, so presumably there must be some gaseous by-products. Nope: I watched very closely, and not one of the little blighters let out any tell-tale train of bubbles.
Seems to me this needs looking into. Wonder if I could get a grant?