http://jiahao.github.io/julia-blog/2014/06/09/the-colors-of-chemistry.html A step-by-step tour on how to derive the visible spectra from absorption and emission spectra.
Best of LotD
http://www.tedunangst.com/flak/post/signal-safe-strcpy POSIX forbids using strcpy in signal handlers. Here's how to get around that.
http://basalgangster.macgui.com/RetroMacComputing/The_Long_View/The_Long_View.html The Long View writes about long-forgotten technical details from the original Macintosh system.
http://articlesofmeritnotlisted.com/quiltstuff/Bananas.html/Bananas.pdf A comprehensive history of the candlestick salad.
http://www.nytimes.com/2005/11/06/national/06island.html?_r=0 America's dangerous floating islands.
http://en.wikipedia.org/wiki/Capitol_Hill_Babysitting_Co-op This babysitting co-op makes for an excellent example of how monetary and fiscal policy work.
Valve has released the tool used to make its animated skits. It's already been put to good use to make the impressive Falcon punch video and a parody of Kayne West's music video for his song Power. I expect some great, high-quality videos to be made by hobbyists with this tool over the next year.
http://www.gladwell.com/2010/2010_02_15_a_drinking.html Intoxicated behavior is largely influenced by culture.
http://twitter.com/Horse_ebooks @horse_ebooks is a Twitter account which posts random, out of context lines from ebooks about horses. This is a collection of some of the best posts, these are comics made from its tweets and this blog has short stories made from @horse_ebooks quotes.
http://visuallearningresearch.wiki.educ.msu.edu/file/view/Harp+%26+Mayer+(1998).pdf Seductive details (unrelated, interesting facts) don't help students remember.
http://mjg59.livejournal.com/136274.html A rant on the desire to create "lightweight" open source software replacements. I'm linking this in particular because "To a first approximation, when someone says "Lightweight" what they mean is 'I don't understand the problems that the alternative solves'." is an excellent quote and summary of the issue.
http://www.resexcellence.com/ The long-defunct Mac website ResExcellence has returned with its old content. Back in the day this site had all kinds of information about the workings of Macintosh systems and I personally learned quite a bit from it in grade school and junior high. It certainly set me on the path that led me to learning everything I know about software.
http://betterexplained.com/articles/a-visual-intuitive-guide-to-imaginary-numbers/ An explanation of how imaginary numbers work as a rotation.
http://www.overthinkingit.com/2011/04/25/star-wars-death-star-economics/ A look at the motivations and economics of the Death Star.
http://www.youtube.com/watch?v=MIN8Cm5rYXY#t=5m35s I really, really don't know the context for this.