Danh ngôn của Randall Munroe (Sứ mệnh: 4)

I don't have hard numbers about this, but the impression I get is that the amount of eyeballs you get from being on the humor shelf at Barnes & Noble - it is almost insignificant.
I'm sad that my childhood came just slightly before the lithium-ion-battery boom, because I would've killed for the cheap radio-controlled helicopters they have now.