A bucketful of water may support ten thousand copepods; but a water snake may require a marsh to himself, as a whale needs league upon league of sea, or a bear the half of a mountainside. It is a question if there be any biologic advantage in mastering your environment when you need such a quantity of it to support you.

An Almanac for Moderns - April Sixteenth (p. 29), G.P. Putnam's Sons. 1935