Fur Cough
New member
Yes. That's all true - apart from the 'unsolved mysteries' bit. There have been discharges from planes that are not just vapour trails. Some of them are indeed 'teeming with biological organisms' and sometimes a tar-like substance has been noted on leaves and other surfaces.
You however are not going to like the explanation. Or more to the point you are not going to believe the explanation.
It's poo isn't it? I was thinking that earlier.