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[* black] A bracket, some antenna cables, a few screws, and finally we get to the creme de la creme, the fan with asymmetric blade spacing.
[* icon_note] We jumped at calling the fan inside the [guide|9457|MacBook Air 13" Mid 2012|stepid=36162] "asymmetrical," but when compared to the fan inside this MacBook Pro, the Air's fan is definitely more ''[http://en.wikipedia.org/wiki/Rotational_symmetry|periodic]''.
[* black] Theoretically, the asymmetry spreads the noise produced over multiple frequencies, making it less noticeable.
-[* icon_note] This fan has been mentioned in almost all press on the MacBook Pro with Retina display. While it's a cool feature, we're surprised at how much attention a minor blade spacing change is getting. That's a testament to the prowess of Apple's marketing department.
+[* icon_note] This fan has been mentioned in almost all press on the MacBook Pro with Retina display. We are surprised at how much attention a minor blade spacing change is getting. It is never the less a testament to how much attention Apple puts on minor details overlooked by the rest of the industry, all for the comfort of the end user.