NPR Staff

We've all been there — having fun relaxing with friends and family, when someone says something a little racially off. Sometimes it's subtle, like the friend who calls Thai food "exotic." Other times it's more overt, like that in-law who's always going on about "the illegals."

In any case, it can be hard to know how to respond. Even the most level-headed among us have faltered trying to navigate the fraught world of racial awkwardness.

A decade after Martin Cooper made the world's first public call from a portable phone in 1973, telephones were becoming truly mobile.

"It's still pretty rare to see someone using a telephone in a car. But it's about to become a lot more common." That's how NPR host Jim Angle introduced a piece on Nov. 5, 1983, titled "Cellular Phones Are Completely Mobile" — the earliest mention of the term found in NPR's archives.

Donald Trump and Hillary Clinton went head-to-head Monday night in the first presidential debate.

NPR's politics team, with help from reporters and editors who cover national security, immigration, business, foreign policy and more, live annotated the debate. Portions of the debate with added analysis are underlined in yellow, followed by context and fact check.

Donald Trump and Hillary Clinton went head to head Monday night in the first presidential debate.

NPR's politics team, with help from reporters and editors who cover national security, immigration, business, foreign policy and more, live annotated the debate. Portions of the debate with added analysis are underlined in yellow, followed by context and fact check.

Rick Wilking - Pool/Getty Images

Donald Trump and Hillary Clinton go head-to-head in the first presidential debate Monday night. NPR's politics team, with help from reporters and editors who cover national security, immigration, business, foreign policy and more, is live annotating the debate.

Portions of the debate with added analysis are highlighted, followed by context and fact check from NPR reporters and editors.

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As we surf from website to website, we are being tracked — that's not news. What is news, revealed in a recent paper by researchers at Princeton University, is that the tracking is no longer just about the "cookies" that record our tastes. The researchers surveyed a million websites and found that state-of-the-art tracking is a lot more sophisticated, allowing websites to track the fingerprints left by our devices.

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Many Americans are familiar with the astronaut heroes of the 20th century space race — names like Gus Grissom and Neil Armstrong. But who did the calculations that would successfully land these men on the moon?

Several of the NASA researchers who made space flight possible were women. Among them were black women who played critical roles in the aeronautics industry even as Jim Crow was alive and well.

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(SOUNDBITE OF BRUCE SPRINGSTEEN SONG, "BORN IN THE U.S.A.")

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(SOUNDBITE OF BUCKWHEAT ZYDECO SONG, "ZYDECO LA LOUISIANEE")

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