+The **Second Law** is a fundamental principle stating that in an isolated system, [Entropy](/wiki/Entropy)—a measure of disorder—will naturally increase over time. This irreversible process guides the universe towards a state of greater equilibrium and explains why heat flows from hot to cold. It defines the inherent directionality of many natural phenomena.
+## See also
+- [Thermodynamics](/wiki/Thermodynamics)
+- [First Law](/wiki/First_Law)
+- [Energy](/wiki/Energy)
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