The second law of thermodynamics is one of those puzzling laws of nature that simply emerges from the fundamental rules. It says that entropy, a measure of disorder in the Universe, must always ...

Exactly 200 years ago, a French engineer introduced an idea that would quantify the universe’s inexorable slide into decay. But entropy, as it’s currently understood, is less a fact about the world ...

Recently, when we were talking about why time only moves forward, we got into talking about the Second Law of Thermodynamics. It says that disorder, otherwise known as entropy, must always increase.