To everyone in the Denver area: my talk scheduled for Thursday night December 11th at the Denver Museum of Science & Nature has been canceled. Looks like there weren't enough pre-registrations (too close to the holiday season maybe?), and so they decided to postpone the talk until next year. I apologize to anyone who was planning on attending. I'm always hoping to do more events in the local Denver metro area (including Boulder of course), so I'm sure other things will turn up. Sorry about this.