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Twitter, Apple, Snapchat, and Facebook are embroiled in controversies about the balance between protecting user data and cooperating with law enforcement. NPR's Arun Rath speaks with tech correspondent Steve Henn about the issue.

Overconsumption from the holiday shopping season can have negative an environmental impact. But there are ways to make gift giving more sustainable.

Also: Survivors have harrowing tales after Brazilian nightclub fire; unrest continues in Egypt; Toyota regains No. 1 spot among auto companies; French and Malian forces move into Timbuktu.

A new Internet protocol system launched Wednesday, adding trillions upon trillions of new Internet addresses that can now connect almost everything you own to the Web. Here's what you need to know about all that extra digital real estate.

The practice caused immediate privacy concerns when the ride-hailing company added it in November. Users will regain the option to choose to share location data with the app only when using it.

Mayor Rahm Emanuel has been under criticism for his handling of police misconduct, especially in the wake of the shooting death of a black teenager.

Tech companies that field National Security Agency data requests are currently barred from sharing those requests publicly. But Google, Microsoft and Facebook all have a financial interest in showing their users that the NSA does not enjoy unfettered access to their data.

The State Department and the Yale School of Public Health's Humanitarian Research Lab release new information about Belarus' "complicity in and support for" Russia's abduction of Ukrainian children.

Many senior citizens are using cannabis to deal with chronic health conditions but experts say they should beware of potentially negative interactions with medications and other problems.

For years, people have used Facebook informally to look for dates. Now Mark Zuckerberg says the platform is starting a dating service. Some experts say the move could invite unwanted solicitation.