Incidents of travelers being denied entry into the United States in recent weeks have sparked concern over what to expect at airports and other border crossings.

One was plenty.

A furniture designer and her adult children share a modern mountainside compound outside of São Paulo.

Greater awareness, not vaccines, has driven an increase in diagnoses.

Over the past two decades, school districts have spent billions equipping classrooms with laptops, yet students have fallen further behind on essential skills, Michael Bloomberg argues. With about 90% of schools now providing these devices, test scores hover near historic lows -- only 28% of eighth graders proficient in math and 30% in reading. Bloomberg notes technology's classroom push came from technologists and government officials who envisioned tailored curricula. Computer manufacturers, despite good intentions, had financial interests and profited substantially. The Google executive who questioned why children should learn equations when they could Google answers might now ask why they should write essays when chatbots can do it for them. Studies confirm traditional methods -- reading and writing on paper -- remain superior to screen-based approaches. Devices distract students, with research showing up to 20 minutes needed to refocus after nonacademic activities. As some districts ban smartphones during school hours, Bloomberg suggests reconsidering classroom computer policies, recommending locked carts for more purposeful use and greater transparency for parents about screen time. Technology's promise has failed while imposing significant costs on children and taxpayers, he writes. Bloomberg calls for a return to books and pens over laptops and tablets.

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A new AI system called Aardvark could deliver weather forecasts as accurate as those from advanced public weather services but run on desktop computers, according to a project unveiled Thursday and published in Nature. Developed by the UK's Alan Turing Institute with partners including Cambridge University, the European Centre for Medium-Range Weather Forecasts and Microsoft, Aardvark aims to make sophisticated forecasting accessible to countries with fewer resources, particularly in Africa. The system has already outperformed the US Global Forecast System on many variables in testing. Project leader Richard Turner noted the system is "completely open source" and not planned for commercialization by Microsoft.

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IBM is laying off thousands of employees across the United States, with approximately 25% of staff at its Cloud Classic operation affected, The Register reports, citing a source. "Concrete numbers are being kept private," a source told the publication. "It is in the thousands." Staff reductions have occurred in Raleigh, North Carolina; New York; Dallas, Texas; and California, the report said. Affected departments include consulting, corporate social responsibility, cloud infrastructure, sales, and internal systems teams. The report adds: With regard to IBM Cloud Classic -- the infrastructure-as-a-service (IaaS) outfit offering built on IBM's 2013 acquisition of SoftLayer -- another source told us: "It's a resource action. I don't know how many people are in IaaS classic. They don't typically make that information easy to find. What I can say is that they have been making a lot of changes to shift employment to India as much as possible." A third source, newly let go by Big Blue, said it was fair to characterize this a layoff. "Everyone I know that was affected, myself included, was simply offered a separation agreement," this individual said, estimating that 10 percent of the Cloud group (which is not the same as Cloud Classic) has been let go.

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The recall of about 46,000 vehicles includes all models that were manufactured from November 2023, when the Cybertruck was first produced, through February.

Nvidia is selling its scarce RTX 5080 and 5090 graphics cards from a pop-up "food truck" at its GPU Technology Conference, where attendees paying over $1,000 for tickets can purchase the coveted hardware alongside merchandise. The company has only 2,000 cards available (1,000 each of RTX 5080 and 5090), released in small batches at random times during the three-day conference which concludes tomorrow.

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President Trump’s actions on immigration over the last few weeks may seem like chaos. But they’ve been in motion since 2023. Maggie Haberman, a White House correspondent for The New York Times, walks us through the president’s plan to test the limits of his power in the courts.

Apple is undergoing a rare shake-up of its executive ranks, aiming to get its artificial intelligence efforts back on track after months of delays and stumbles, Bloomberg News reported Thursday, citing people familiar with the matter. From the report: Chief Executive Officer Tim Cook has lost confidence in the ability of AI head John Giannandrea to execute on product development, so he's moving over another top executive to help: Vision Pro creator Mike Rockwell. In a new role, Rockwell will be in charge of the Siri virtual assistant, according to the people, who asked not to be identified because the moves haven't been announced. Rockwell will report to software chief Craig Federighi, removing Siri completely from Giannandrea's command. Apple is poised to announce the changes to employees this week. The iPhone maker's senior leaders -- a group known as the Top 100 -- just met at a secretive, annual offsite gathering to discuss the future of the company. Its AI efforts were a key talking point at the summit, Bloomberg News has reported. The moves underscore the plight facing Apple: Its AI technology is severely lagging industry rivals, and the company has shown little sign of catching up. The Apple Intelligence platform was late to arrive and largely a flop, despite being the main selling point for the iPhone 16. Further reading: 'Something Is Rotten in the State of Cupertino'

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Scientists are using machine learning to find new treatments among thousands of old medicines.

Cosmologists have uncovered stronger evidence that dark energy -- the mysterious force accelerating cosmic expansion -- may be weakening over time. The Dark Energy Spectroscopic Instrument (DESI) collaboration presented their latest findings at the Global Physics Summit in Anaheim, California, reinforcing their preliminary results from last year. The DESI team analyzed data from approximately 15 million galaxies collected over three years, more than doubling their previous dataset of 6 million galaxies. Combined with supernova observations and cosmic microwave background data, their analysis shows a 4.2-sigma deviation from the standard Lambda-CDM cosmological model, which assumes dark energy remains constant. "We are much more certain than last year that this is definitely a thing," said Seshadri Nadathur of the University of Portsmouth, a key DESI researcher. These findings align with recent independent results from the Dark Energy Survey (DES), which earlier this month reported a similar 3.2-sigma tension with Lambda-CDM -- a tension that disappears if dark energy is allowed to vary. If confirmed, evolving dark energy could fundamentally alter cosmologists' understanding of the universe's ultimate fate. Instead of expanding indefinitely until all particles become impossibly separated, the universe might follow alternative trajectories. "It challenges the fate of the universe," explained Mustapha Ishak-Boushaki from the University of Texas at Dallas. "It's game-changing." Moreover, these findings challenge the simplest explanation of dark energy as vacuum energy, which quantum physics suggests should remain constant. Instead, the results indicate unknown physics, possibly involving a new particle, a modification to Einstein's theory of gravity, or even a new fundamental theory. DESI will continue observing through 2026, eventually producing a final map expected to include 50 million galaxies, potentially providing definitive evidence for this cosmic paradigm shift.

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Pebble founder Eric Migicovsky has warned that the company's revived smartwatch line will face significant functionality limitations when paired with iPhones, blaming Apple's restrictive policies that favor its own Apple Watch. "It's impossible for a 3rd party smartwatch to send text messages, or perform actions on notifications (like dismissing, muting, replying) and many, many other things," Migicovsky wrote in a blog post, adding that the situation has "actually gotten worse over the last 8 years." A 2024 class action lawsuit cited in the post claims Apple has added further restrictions since iOS 13, including requiring users to display full content previews on their lock screens for notifications to reach third-party watches. Pebble is still developing an iOS app because 40% of potential customers use iPhones, he said. Migicovsky warned that the watch will "always appear to have less developed functionality on iOS than Android" and some features will arrive on Android first.

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The credit-card market has quietly split in two, Atlantic argues in a new story: one offering generous benefits to wealthy Americans, the other offering expensive debt to the poor. Credit-card balances have reached an all-time high of $1.2 trillion, with serious delinquency rates climbing to their highest point since the Great Recession. "Transactors" pay off balances monthly and earn valuable rewards worth up to $3,000 annually in taxable income equivalent, while "revolvers" carry balances at a brutal 21.5% average APR. The poor subsidize the rich through two mechanisms: swipe fees that drive up retail prices by $1,700 annually for the average family, and late fees and interest charges that finance rewards programs. Interest revenue for credit-card companies has ballooned from $76 billion in 2020 to $170 billion in 2024. The economy now appears to be slowing down. High-income families are increasingly resembling working-class families in credit data, with three in five households earning over $80,000 annually carrying balances for more than a year. Card companies are now offering fewer cards to subprime borrowers, creating a troubling dilemma - while expensive credit cards are harmful, having no credit access might be worse. Bipartisan legislation now aims to cap interest rates and lower swipe fees.

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Microsoft is developing a new Windows 11 feature that will explain how hardware limitations affect PC performance. The latest preview builds include a hidden FAQ section in system settings that addresses GPU memory, system RAM, and OS version impacts. The feature, discovered by Windows observer "phantomofearth" in this week's Dev Channel build, requires manual activation. It provides specific recommendations for configurations like low RAM or GPUs with less than 4GB memory, and flags outdated Windows versions.

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The National Archives has released thousands of pages of declassified records related to the assassination of President John F. Kennedy in 1963. From a report: The records were posted to the National Archives' website, joining recently released records posted in 2023, 2022, 2021 and 2017-2018. "This release consists of approximately 80,000 pages of previously-classified records that will be published with no redactions," said the announcement from the Office of the Director of National Intelligence. "Additional documents withheld under court seal or for grand jury secrecy, and records subject to section 6103 of the Internal Revenue Code, must be unsealed before release." President Donald Trump signed an executive order on Jan. 23 directing the release of all remaining records related to the assassination, saying it was in the "public interest" to do so. Tuesday's initial release contained 1,123 records comprising 32,000 pages. A subsequent release on Tuesday night contained 1,059 records comprising 31,400 additional pages.

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The Trump administration should back away from threats and engage Iran in an effort to bring a diplomatic halt to its nuclear weapons capability.

The man who ordered the Philippines’ bloody war on drugs is now in a cell at The Hague. Getting him there was far from a sure thing.

Canada’s foreign minister said the government would continue to ask for leniency from China for other Canadians in similar situations.