When it comes to his work, Singhal really is the human search engine. He’s been working on unpaid search at Google for more than a decade. He dreams of creating a technology similar to the computer on the starship Enterprise, that can answer questions such as How did Alfred Nobel make his money? At the moment, that’s beyond the capability of modern search engines…but we’re getting closer. Trial and error plays a huge role in the process. Consider this: Google’s search algorithm simultaneously considers more than 200 factors when ranking results. The company launched more than 500 changes…