Facebook sets engineers to work on grown-up search.

(PhysOrg.com) -- Facebook is planning to get serious about its search engine. Sources tipped off reporters this week about Facebook plans to upgrade its search engine and run toward the money that can be gained from optimized search. Tongues are wagging about how, not when, and story headlines are pairing the Facebook plan with thoughts about Google, namely what the search surge can mean as a challenge to Google. Numerous sites that watch both Google and Facebook marvel at the two companies’ opposite moves; of Google moving toward social while Facebook moving toward search.