from the photographing-caves-and-rivers dept.
Lorenzo de Medici asks: "In August I have the great pleasure of being able to hike all sixteen miles of the ZionNarrows. I'd like to take along a camera, but the problem is that the water level in the Narrows can be unpredictable, with flash floods arriving with little warning. Light levels tend to be low as well. Does anyone have any advice on what kind of camera I could bring that would survive yet still bring in decent photo quality?"
Mathematics deals exclusively with the relations of concepts
to each other without consideration of their relation to experience.
-- Albert Einstein