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How to beat a cosmic speeding ticket
via backreaction.blogspot

xkcd: The Search After I had spent half a year doing little more than watching babies grow and writing a review article on the minimal length, I got terribly bored with myself. So I’m apparently one of the world experts on quantum field theories with...
Albert Einstein 1911-12, 1922-23
via motls.blogspot

Several events related to Albert Einstein's life occurred in recent days and months. If you consider yourself a sort of Einstein fan, you may let me mention some of them. First, you may finally buy Einstein's brain for $9.99 (or $13.99 now?), no strings...
How to Build Your Own Wiki
via thumbsplus.tutsplus

Now that you understand what wikis are all about, and how they can be used in your business, all that's left is to start your own wiki and get your team using it to organize your info. It sure would be great if I could point you to a single website...
Link Detox Boost™ – Get rid of a Google Penalty in 3 days
via linkresearchtools

Link Detox Boost™ – Get rid of a Google Penalty in 3 days is a post from the best Link Building Tools available worldwide. Recover Faster – Link Detox Boost™ I am very proud to present our latest tool Link Detox Boost&trade...
Google Algorithms Explained, Part 1: Don’t Be Spam
via sitepoint

This article is part of an SEO series from WooRank. Thank you for supporting the partners who make SitePoint possible. In the SEO world, Google algorithm updates are big news. They often have a big impact for sites that can be felt for months, or in...

Physicsinsights.org popular pages

Solid Angles

Path: physics insights > basics > Solid Angles The ordinary angle, measured in radians, is the length of the arc of a unit circle subtended by the angle. A full circle, 360 degrees, is 2 π radians, ...
Sudoku examples

See the main Sudoku page for information on the analysis and construction of these puzzles. NB -- In the unlikely event that there are any "repeat visitors" to this page, pleas...

Ideal Lenses, Part II

Ideal Lenses II: How Any Ray is Bent We already discussed the basic properties of ideal lenses in Ideal Lenses and Mirrors. However, all we learned there was what happens to rays which are entering...