“A whole bunch of things that I’ve been working on for 30 years are converging in a very nice way,” he told the audience, before launching into a rather lengthy history of Mathematica’s development. “Given how complicated things in nature are, you might think the programs running them would be very complicated,” he began. As his research progressed, however, he soon found the exact opposite: simple equations and programming could underpin enormously complicated systems.

It took a lot of Mathematica code to make the Wolfram Alpha system work

The Space Shuttle Main Engine was handled in a different manner, top down, we might say. The engine was designed and put together all at once with relatively little detailed preliminary study of the material and components. Then when troubles are found in the bearings, turbine blades, coolant pipes, etc., it is more expensive and difficult to discover the causes and make changes. For example, cracks have been found in the turbine blades of the high pressure oxygen turbopump. Are they caused by flaws in the material, the effect of the oxygen atmosphere on the properties of the material, the thermal stresses of startup or shutdown, the vibration and stresses of steady running, or mainly at some resonance at certain speeds, etc.? How long can we run from crack initiation to crack failure, and how does this depend on power level? Using the completed engine as a test bed to resolve such questions is extremely expensive. One does not wish to lose an entire engine in order to find out where and how failure occurs. Yet, an accurate knowledge of this information is essential to acquire a confidence in the engine reliability in use. Without detailed understanding, confidence can not be attained. A further disadvantage of the top-down method is that, if an understanding of a fault is obtained, a simple fix, such as a new shape for the turbine housing, may be impossible to implement without a redesign of the entire engine.

The thing that's amazing is these are huge companies, and they have a lot of power, but in the United States nobody has heard of them and they're having trouble gaining traction, but it's not impossible

"Of course, we haven't been able to grow hands," Casares told New Scientists

Internet: help us out. If you’re on Reddit (we’re not) or any other nerdly social media sites where we might get information about this, feel free to post far and wide and e-mail any answers, clues, ideas, thoughts, or musings to indianajonesjournal@uchicago.edu (yes, we did set up an email account just to deal with this thing).

"In a parallel process, the investigators gained access, probably using a search warrant, to Ms. Broadwell’s Gmail account. There they found messages that turned out to be from Mr. Petraeus." Source: http://www.nytimes.com/2012/11/14/us/david-petraeus-case-raises-concerns-about-americans-privacy.htm