You're probably aware of the kerfluffle over NASA's records indicating there have been a lot more near mid-air crashes than previously thought.

As an illustration of this reality, check out these gorgeous depictions of FAA flight patterns data, from artist Aaron Koblin (here and here). There are cool still shots, as well as beautiful movies like this one and this one.

They're stunning -- both aesthetically, and in the realization that there really are that many planes flying around at any given time.