You may be amazed at how it's possible to ship a package and have it arrive anywhere in the world overnight (for a premium price), but you'll be even more amazed when you see how it's done. FedEx, UPS, and DHL have overnight shipping down to an art. After watching this, I can understand why UPS will pay your college tuition if you work the third shift at their sorting facilities.
The sheer volume of packages sent through the three major carriers is staggering, but the system has evolved to get it done. Wendover Productions can take a simple question, go deep into the details, and managed to make even the driest subjects fascinating.