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When Steve Wozniak, the co-founder of Apple, suffered a dizzy spell on Wednesday, he took a precautionary trip to the hospital and learned that he had suffered a minor stroke. A day later, he said in an interview, the hospital released him and he was “doing good.”The health scare came during a trip to Mexico City, where Mr. Wozniak, 73, was slated to speak at a conference called the World Business Forum. The dizzy spell hit him as he was typing at his computer, he said. The hospital did an M.R.I., he added, and determined that he had a small capillary leak as well as symptoms of vertigo.Mr. Wozniak flew home to Los Gatos, Calif., on Thursday and was waiting for dinner to be served when he talked with The New York Times. “I’m back home and feeling good,” he said.The worst part of the experi...

More Americans are buying heat pumps, an environmentally friendly alternative to furnaces and air-conditioners that can significantly lower monthly energy bills. But the pace of installations has slowed in the past year, posing an obstacle to the Biden administration’s climate plans.Rising interest rates and inflation combined with a slow and confusing rollout of federal government incentives for the purchase of heat pumps are largely responsible for the recent drop in sales, energy analysts said. These headwinds, if they persist, could jeopardize President Biden’s goals of effectively eliminating U.S. emissions of greenhouse gases by 2050.Mr. Biden’s signature climate law, the Inflation Reduction Act, offers tax credits of up to $2,000 a year for the purchase of heat pumps, devices that c...

Nature, one of the most prestigious journals in scientific publishing, on Tuesday retracted a high-profile paper it had published in March that claimed the discovery of a superconductor that worked at everyday temperatures.It was the second superconductor paper involving Ranga P. Dias, a professor of mechanical engineering and physics at the University of Rochester in New York State, to be retracted by the journal in just over a year. It joined an unrelated paper retracted by another journal in which Dr. Dias was a key author.Dr. Dias and his colleagues’ research is the latest in a long list of claims of room-temperature superconductors that have failed to pan out. But the retraction raised uncomfortable questions for Nature about why the journal’s editors publicized the research after the...

One afternoon last month, hundreds of students at Timber Creek High School in Orlando poured into the campus’s sprawling central courtyard to hang out and eat lunch. For members of an extremely online generation, their activities were decidedly analog.Dozens sat in small groups, animatedly talking with one another. Others played pickleball on makeshift lunchtime courts. There was not a cellphone in sight — and that was no accident.In May, Florida passed a law requiring public school districts to impose rules barring student cellphone use during class time. This fall, Orange County Public Schools — which includes Timber Creek High — went even further, barring students from using cellphones during the entire school day.In interviews, a dozen Orange County parents and students all said they s...

When the San Francisco start-up OpenAI unveiled its ChatGPT online chatbot late last year, millions were wowed by the humanlike way it answered questions, wrote poetry and discussed almost any topic. But most people were slow to realize that this new kind of chatbot often makes things up.When Google introduced a similar chatbot several weeks later, it spewed nonsense about the James Webb telescope. The next day, Microsoft’s new Bing chatbot offered up all sorts of bogus information about the Gap, Mexican nightlife and the singer Billie Eilish. Then, in March, ChatGPT cited a half dozen fake court cases while writing a 10-page legal brief that a lawyer submitted to a federal judge in Manhattan.Now a new start-up called Vectara, founded by former Google employees, is trying to figure out how...

For years, landlords around the world clamored to get WeWork into their office buildings, a love affair that made the co-working company the largest corporate tenant in New York and London.Now, WeWork is perhaps days away from a bankruptcy filing — and its demise could not come at a worse time for office landlords.With fewer employees going into the office since the pandemic, companies have slashed the amount of space they lease, causing one of the worst crunches in decades in commercial real estate.Many landlords have accepted lower rents from WeWork in recent years to keep it afloat, but its bankruptcy would be an enormous blow. The pain would be centered on landlords that have leased a large proportion of their space to the company, particularly in New York, and are struggling to make p...

Exactly a decade ago, Amazon revealed a program that aimed to revolutionize shopping and shipping. Drones launched from a central hub would waft through the skies delivering just about everything anyone could need. They would be fast, innovative, ubiquitous — all the Amazon hallmarks.The buzzy announcement, made by Jeff Bezos on “60 Minutes” as part of a Cyber Monday promotional package, drew global attention. “I know this looks like science fiction. It’s not,” said Mr. Bezos, Amazon’s founder and the chief executive at the time. The drones would be “ready to enter commercial operations as soon as the necessary regulations are in place,” probably in 2015, the company said.Eight additional years later, drone delivery is a reality — kind of — on the outskirts of College Station, Texas, north...

Mint, one of the earliest and most popular personal finance apps, is shutting down, and its owner, Intuit, is encouraging users to switch to Credit Karma, its platform that offers free credit scores and helps users track their money.Intuit said on Tuesday that it was “reimagining” Mint as part of Credit Karma and that Mint users would be able to transition to Credit Karma. Credit Karma will absorb Mint by Jan. 1, Intuit said in a statement on Friday.Mint has been one of the top online budgeting tools for years, with 3.6 million active users in 2021, according to Bloomberg. Introduced in 2007, it was a game-changer in the world of personal finance, surging in popularity as more people turned to free online services to create budgets and track their income and spending.The news that Mint wou...

Rishi Sunak, the prime minister of Britain, had one last appointment on Thursday evening after a busy couple of days hosting dozens of government leaders, tech executives and other experts at a summit on the dangers of artificial intelligence: a sit-down with Elon Musk.Mr. Musk, the omnipresent tech billionaire, was in town for the A.I. Safety Summit that Mr. Sunak had organized at Bletchley Park, the countryside estate where Alan Turing helped crack the Enigma code used by the Nazis during World War II. Public officials including Vice President Kamala Harris and António Guterres, the secretary general of the United Nations, attended the summit, as did tech leaders like Sam Altman, the head of OpenAI; and Reid Hoffman, the investor and co-founder of LinkedIn.But only Mr. Musk, a man with g...