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UPDATE (Part 4): The FAA lifted the nationwide ground stop at ~8:15 PM ET after 4+ hours. Nearly 5,000 flights cancelled. Sec. Duffy blames overloaded, "incredibly old" routers. What broke:

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Part 3: The FAA put a new AI tool in all 22 air traffic control centers 3 days before every US flight got grounded. Officials haven't linked them. What's real vs rumor tonight:

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UPDATE (Part 2): US flights still grounded as of 6:05 PM ET. The FAA now calls it a temporary telecommunications outage, and DHS says no sign of a nefarious act so far.

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Every US flight was grounded today. The FAA ordered a nationwide ground stop at 3:54 PM ET over a communications problem at air traffic control centers. Here's what we know (Part 1).

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Google and Samsung opened preorders today for Gemini smart glasses, from $395, on sale Dec 10. A 12MP camera, 4 mics, 2 speakers, about 41 grams, and no screen: Gemini answers by voice. Google Glass cost $1,500 and was pulled in 2015. Would you wear a camera on your face?

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A 17-year-old lost for 6 days in the Australian bush was found alive Thursday. A police helicopter crew spotted a tackle box, zoomed in, and saw him by a creek, about 2 km from where he was last seen. His mom says he's "grounded for life." Stay put or keep walking?

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U.S. home sales just fell to a 16-year low: down 5.5% in October to the slowest pace since 2010, the Realtors say. Mortgage rates averaged 7.33% (Freddie Mac). Prices still hit an October record, about $417,000. Frozen market, not a crash. Buy now, or wait for rates to drop?

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Watching someone yawn is enough to make about half of adults yawn too. And you might feel one coming right now. Did you yawn watching this? 👇
#explained #explainthis #yawning #brain #science

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Jensen Huang has resigned as Nvidia CEO, effective immediately, Nvidia announced Thursday. CFO Colette Kress is interim CEO. Nvidia gave no reason. The stock fell more than 13% at the open (CNBC). Earnings are Tuesday. Should a founder lose his company over this?

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The polar vortex just broke down earlier than ever recorded, CNN reports (old record: Nov 28). The eastern US runs 7 to 14°F below normal this week. But NOAA's outlook still favors a milder winter up north thanks to a very strong El Niño. Team snow day or team mild winter?

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Swallowed gum does not sit in your stomach for seven years. Most of the time, it's gone in a few days. Did you believe the seven-year gum myth? 👇
#explained #explainthis #gum #myths #science

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United Airlines just banned AI agents from booking its flights. Bots can still search fares, but new rules dated Nov 11 let United cancel a ticket a bot booked. CEO Scott Kirby: "To be honest, I don't want to create another middleman." Would you trust an AI with your card?

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Chipotle will give you a free second entrée this Friday the 13th for showing a tattoo, even one you drew on with a pen. 3 to 4 p.m. local time, in the restaurant only, staff decide. Would you draw one on?
#chipotle #fridaythe13th #explained

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It's the weirdest scoring system in sports, and nobody has fixed it in 500 years.

Should tennis just count 1, 2, 3?

Source: Wikipedia, "Tennis scoring system"; Britannica; Online Etymology Dictionary.

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Tennis jumps from 15 to 30 to 40, and the best explanation is a medieval clock face.

It's the leading theory, though nobody has proven it. Here's how it works:

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And love for zero? The popular story says it's l'oeuf, French for egg, because a zero looks like one.

A lot of historians doubt that. They say it comes from playing for love, meaning for nothing.

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Mercury retrograde November 2026 ends this Friday, Nov 13 🪐 But Mercury never actually moves backward. It laps Earth on the inside lane, and from our side of the Sun its path across the sky flips direction. Have you ever blamed Mercury retrograde? 👇 #mercuryretrograde