Dear Dave,
I think you should follow through on your idea and let us all know what the
results are. There are literally tons of pigeon dropping in the palm trees
and on the flat roofs of buildings in the Phoenix area. In fact, there are
quite a few on the roof of my own house. Come on down
Dear List;
If a bunch of city pigeons were eating the tiny stones from old roofing
paper on a roof, and were also eating micro meteorites as a source for
gastroliths, would they deposit micro meteorite bird do-do on the roofs
of buildings to be blown down on unsuspecting passers by that
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