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Your inbox overflows with spam, so what else is new? But have you ever wondered how junk email got its name? And where all of it comes from? Finn Burton, author of Spam: A Shadow History of the Internet describes the spam business, how it's become a criminal enterprise and how you can protect yourself online.

Airs Saturday, March 25, 2017 at 9:30 a.m. & Sunday, March 26 at 7 a.m. on KPBS TV

The educational division of the media conglomerate News Corp, called Amplify, unveiled a new digital tablet this week at the SXSW tech conference in Austin, Texas, intended to serve millions of schoolchildren and their teachers across the country.

The educational division of the media conglomerate News Corp, called Amplify, unveiled a new digital tablet this week at the SXSW tech conference in Austin, Texas, intended to serve millions of schoolchildren and their teachers across the country.

A new poll conducted by NPR, the Robert Wood Johnson Foundation and the Harvard School of Public Health finds most baby boomers say they're planning on an active and healthy retirement. But some experts worry that when it comes to their health, boomers are still woefully unprepared — or worse, in denial.

A key hearing Monday may be the last phase in deciding whether a rock quarry north of San Diego can go forward. A supporter and opponent of the Liberty Quarry projects argue their sides.

The space shuttle Endeavour made a picture-perfect liftoff Monday morning as it headed for the International Space Station in the penultimate flight of the shuttle era.

Increasingly, research shows that being fit may trump being fat -- or at least moderately overweight. In one study, physically active but overweight women were less likely to suffer heart problems than their normal weight counterparts who didn't exercise.

The Republican presidential contender said allegations of inappropriate behavior during his time at the National Restaurant Association in the 1990s are "baseless."

Mama's Kitchen expands its service delivering free meals to AIDS and cancer patients in San Diego County.