These web pages give the text and figures I used in my talk. I've tried to attribute these pictures; they can all be found on the web.

I've also included URLs at the bottom of most of the slides of the talk. If you see ``[web page]'' in the slide, that means there are links at the bottom of that page which take you to the relevant external links for the information in that slide. Please poke around in all these sites and see what you like!

Enjoy!

David

To begin the talk, click here.

If you don't want the slides, just the URLs, click here.