Have you ever been happy?” My girlfriend asked me that question, after work over drinks at some shiny Manhattan bar, after another…

Stuart Kauffman’s provocative take on emergence and evolution energizes Sara Imari Walker.

Here’s an alphabetical list of all available free books. Note that many of the links will bring you to an external page, usually with more info about the book and the download links. Also, th…

The four dimensions of spacetime that we experience could be like a hologram projected by a three-dimensional quantum state.