I've got this sense that everything on earth and the universe will eventually decay or end. It may take seconds, hours, years or even billion of years. Let us say for example the life span of fridges and washing machines, the decay of plutonium, and the ultimate end of the universe (the Big Rip).
Is there a concept, idea, or theory that states or tells us that this is indeed the case? And what are those?
I've already got the Second Law of Thermodynamics to begin with.