Atabey Kaygun experiements on the Collatz conjecture.
Statwing on the ecological fallacy; also at Gelman and Hacker News.
Warren O’Neill’s mathematical objects tumblr.
Why it’s so rare for a wife to be taller than her husband.
Bayes’ theorem using trimmed trees, by Brit Cruise at Khan Academy, via Oscar Bonilla.
God plays dice 