Today, Google released an interactive online book that explains things like HTML, browser extensions, and much more. While this is probably very helpful for less tech-savvy web surfers, I am more excited about the underlying technology, HTML5 & CSS3. The site is a great example of what is possible with the latest updates to HTML and CSS. Congrats to the Chrome Team and German illustrator Christoph Niemann. I am excited to do a bit more “source viewing” and see what can be learned from the markup and CSS. To check it out head over to www.20thingsilearned.com and learn something about the web and browsers you may not have already known.