Overnight, we had a brief period of fairly heavy rain. Not a downpour, nor a sprinkle. After rubbing the sleep out of my eyes, I peered out the bedroom window in the morning to see a pond with its surface clear. Huh?
Then I remembered a previous occasion. Rain seems to obliterate certain pond scum incidences. Certainly the ones which depend on clusters of bubbles. Later, when I looked more closely, the only remaining vestiges were under overhanging trees, where the bubble-scum would dodge rain drops arriving from the sky at terminal velocity.
