For more than three decades, Stephen Wolfram, a 59-year-old scientist, software designer and entrepreneur, has built software that has attracted an avid following among mathematicians and scientists. His Mathematica program for symbolic mathematical computation and its programming language, Wolfram Language, are favorites of the intelligentsia of the quant world in universities and corporations. Wolfram Alpha, one of his creations , is a unique search engine that does not forage the web, but culls its own painstakingly curated database to find answers. This week, the search engine turned 10. On the big occasion, Mr. Wolfram has shared some insight:The footage of the launch of Alpha , from 10 years ago.