Curiosity aids learning...

Curiosity aids learning...  At first I thought this article was just confirming the obvious: that curiosity motivates people to learn.  Well, duh!  But they're actually showing something more: that learning while curious leads to greater retention.  There's some speculation about why that should be, but it's just speculation based on blood flow observed in various sections of the brain.  That's a widely used technique, but nobody is really sure that's any more accurate or informative than phrenology...