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Bellevue-based Blucora has bought HowStuffWorks, a website that explains the science behind everything from magnets to Silly String.

Discovery Communications, whose cable channels include TLC and Animal Planet, sold HowStuffWorks for $45 million, taking an 82 percent loss seven years after acquiring the asset.

Blucora, owner of the InfoSpace search business, acquired HowStuffWorks in an all-cash deal, according to a filing Monday.

Discovery will keep providing advertising services to the website it acquired for $250 million in 2007.

It had sought to make HowStuffWorks more in-depth than the low-rent “content farms” that offer cursory information on a broad array of topics to attract search-engine users.

The site ranks 327th for U.S. Web traffic, according to Discovery doesn’t disclose its financial results.

Shares of Discovery, based in Silver Spring, Md, slid 38 cents to $77.45 Monday.

Blucora stock gained 7 cents to $19.25.