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The union that represents N.F.L. players conducted their first-ever survey of workplace conditions, and issued a report card to all 32 teams. What did the survey reveal? Clogged showers, rats in the locker room — and some helpful insights for those of us who don’t play pro football.

For all the speculation about the future, A.I. tools can be useful right now. Adam Davidson discovers what they can help us do, how we can get the most from them — and why the things that make them helpful also make them dangerous. (Part 3 of "How to Think About A.I.")

Guest host Adam Davidson looks at what might happen to your job in a world of human-level artificial intelligence, and asks when it might be time to worry that the machines have become too powerful. (Part 2 of "How to Think About A.I.")

Artificial intelligence, we’ve been told, will destroy humankind. No, wait — it will usher in a new age of human flourishing! Guest host Adam Davidson (co-founder of "Planet Money") sorts through the big claims about A.I.'s future by exploring its past and present — and whether it has a sense of humor. (Part 1 of "How to Think About A.I.")

The famously profane politician and operative is now U.S. ambassador to Japan, where he’s trying to rewrite the rules of diplomacy. But don’t worry: When it comes to China, he’s every bit as combative as you’d expect.

Americans are so accustomed to the standard intersection that we rarely consider how dangerous it can be — as well as costly, time-wasting, and polluting. Is it time to embrace the lowly, lovely roundabout?