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 ...

Let ent denote topological entropy, and let $C'r(S^1, S^1)$ denote the space of continuous functions of the circle to itself having $r$ continuous derivatives with ...

Unscrambling eggs is still impossible, an example of entropy in action. But boiling eggs is no longer the one-way process it used to be. Scientists in California and Australia have figured out how to ...