Some time ago I asked myself: why did gambling become so addictive? You always loose, but it’s so powerfully addictive the behaviour must be beneficial in some way. It occurred to me that you always loose when doing “artificial gambling” (casinos, horse races etc) but “natural gambling” is different. Should we explore this coastline, should we try and cultivate this plant, should we run this scientific experiment? These bets may not pay off individually, but for the overall population over time they always pay off. The natural world has ergodicity.