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Instagram beat Twitter on a key metric, but Twitter's co-founder says he doesn't care. And Google's woes in Europe continued as the tech giant shut down Google News in Spain over a new law there.

Once tucked away in Google's "Labs" space for beta testing, the "Undo Send" option now gives users 5 to 30 seconds after sending an email to change their minds.

Many surgeons prescribe strong pain medicine without knowing how much their patients actually need. A group of doctors says hospitals should be accountable for patients' long-term opioid use.

At the only emergency department providing care in downtown Houston, staff stayed in the hospital throughout the week to care for patients. It was an emotional experience.

Facebook says 126 million people may have seen Russian content aimed at influencing Americans. Marketing gurus say Facebook is unlikely to solve the problem because of its ad-based business model.

As they struggle with disasters and other crises, police, fire and other public officials are spending an increasing amount of time and resources knocking down rumors spreading on social media.

On the 100th anniversary of the polio pioneer's birth, Google takes note with a doodle. As the world gears up to fight Ebola, it's a good time to remember one of the heroes of a 1950s epidemic.

Airs Tuesday, Sept. 13, 2016 at 11 p.m. on KPBS TV

Airs Saturday, April 15, 2017 at 2 p.m. on KPBS TV

Technology is designed to be addictive, offering gratification that's similar to that of drug abuse or gambling. Author Adam Alter says a new frontier could soon provide another escape from reality.