Time Machines and Event Horizons

I’ve written a pop-article about Time Machines and Event Horizons, which has appeared on the Scientific American blog Critical Opalescence.  George Musser, my host, is an editor at Scientific American, and kindly gave me this opportunity to talk about some of my ideas in my article, The Generalized Second Law implies a Quantum Singularity Theorem.

If you have any questions about the physics in the article, please feel free to leave comments on this post here.  (Questions left on the Scientific American website will be answered in the comments to this post, if anywhere.)