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 Alexa.com. 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.