How thermodynamics create odd but regular patterns in the snow. The patio blocks are an insulator, keeping the snow from melting. The dirt between them is allowing the heat stored underground to melt the snow and also drain the meltwater [source: https://t.co/J5yEc4oXYr] pic.twitter.com/0H0mOG51PG

— Massimo (@Rainmaker1973) September 26, 2019