Like many of us, Maggie is navigating her path through a complex world-except, her world is the stream. Having lost her home to changes in the current, Maggie, a mayfly, is searching the stream for the richest of foods with which to nourish her brief flight in the world of air. But the stream, with its ever-changing currents, seems a confusing array of possibilities. Where are the richest of foods? How might she find them? And what are the...