Astronomers discover that our galaxy is a suburb of a supercluster of 100,000 large galaxies they have called Laniakea
What makes a candidate Presidential? A series of articles on what qualities make a good American President by Slate's John Dickerson
Measure-theoretic probability: Why it should be learnt and how to get started. The clickable chart of distribution relationships. Just two of the interesting and informative probability resources I've learned about, along with countless other tidbits of information, from statistician John D. Cook's blog and his probability fact-of-the-day Twitter feed ProbFact. John also has daily tip and fact Twitter feeds for Windows keyboard shortcuts, regular expressions, TeX and LaTeX, algebra and number theory, topology and geometry, real and complex analysis, and beginning tomorrow, computer science and statistics.
Dr. Jeannine Mosely finishes building a level-3 Menger sponge from business cards. You can also build your own, though Dr. Mosely warns, "[a] level 4 sponge would require almost a million cards and weigh over a ton. I do not believe it could support its own weight — so a level 3 is the biggest sponge we can hope to build." (related)
Measuring beauty through arson and ships launched. Introducing the Helen as a unit of beauty. There are plenty of odd units of measure. Some are natural extensions of physical measures, like the microcentury or the pico-parsec, while others are constantly being invented. Can't figure out how large your apartment is? Use a handy converter to measure its area in terms of Wales (or whales, or the Prince of Wales). Of course, despite a long history of odd changes, units are still the subject of political fights and even human rights monitoring.