Sunday night econlinks

• This Science piece on leverage being "the root of all financial turmoil" is interesting (will follow up on it), though a). I doubt leverage is "the" (only) root of the problem; b). we all know that leverage had a large impact, within classical Economics--see, e.g., Bob Solow's discussion on that, in his critical review of Posner's recent book. But well, Science prefers to cite econophysicists.

• Socially adjusted captchas, from the Google Research Blog

• Cheaptalk on something we're all interested in: Why she does and why she doesn't...

• Crisis, what crisis?! Petairways! For every pawsenger.

• The Susan Boyle case: A rush of dopamine?

• Total literary fusion: "And the pursuit of happiness", by Maira Kalman. (I am sure that Ana Pauper will also love this)