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The US and UK have signed a landmark agreement on artificial intelligence, as the allies become the first countries to formally cooperate on how to test and assess risks from emerging AI models.

The agreement, signed on Monday in Washington by UK science minister Michelle Donelan and US commerce secretary Gina Raimondo, lays out how the two governments will pool technical knowledge, information and talent on AI safety.

The deal represents the first bilateral arrangement on AI safety in the world and comes as governments push for greater regulation of the existential risks from new technology, such as its use in damaging cyber attacks or designing bioweapons.

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The future of StabilityAI, once seen as among the world’s most promising artificial intelligence start-ups, has been thrown into doubt following the chaotic departure of its founder and concern it will struggle to become profitable.

Emad Mostaque resigned last week as chief executive of the London-based group behind Stable Diffusion, an AI model that can create images through simple written prompts, with its app being downloaded more than 150 million times.

The three-year-old company was valued at $1 billion in August 2022, following a $101 million funding round led by top US tech investors Coatue and Lightspeed Venture Partners. The deal put it in the vanguard of the generative AI revolution alongside groups such as OpenAI and Inflection.

Enlarge / The steel frame of the Francis Scott Key Bridge sits on top of a container ship after the bridge collapsed in Baltimore on March 26. (credit: Jim Watson/AFP via Getty Images) )

Just shy of half past 1 in the morning, the MV Dali , a giant container ship, was sailing gently out of the port of Baltimore when something went terribly wrong. Suddenly, lights all over the 300-meter-long vessel went out. They flicked on again a moment later, but the ship then began to veer to the right, toward one of the massive pylon-like supports on the Francis Scott Key truss bridge—a huge mass of steel and concrete that spans the Patapsco River.

The Dali ’s lights went out a second time. Then the impact came. The ship plowed into the support, with large sections of the bridge’s main truss section instantly snapping apart and falling into the river. It took just 20 seconds or so for the structure to come down.

Enlarge / The Dali container vessel after striking the Francis Scott Key Bridge that collapsed into the Patapsco River in Baltimore on March 26. The commuter bridge collapsed after being struck by a container ship, causing vehicles to plunge into the water and halting shipping traffic at one of the most important ports on the US East Coast. (credit: Al Drago/Bloomberg via Getty Images )

A container ship rammed into the Francis Scott Key Bridge in Baltimore around 1:30 am on March 26, 2024, causing a portion of the bridge to collapse into Baltimore Harbor. Officials called the event a mass casualty and were searching for people in the waters of the busy port.

This event occurred less than a year after a portion of Interstate 95 collapsed in north Philadelphia during a truck fire. That disaster was initially expected to snarl traffic for months, but a temporary six-lane roadway was constructed in 12 days to serve motorists while a permanent overpass was rebuilt.

US cities often face similar challenges when routine wear and tear , natural disasters , or major accidents damage roads and bridges. Transportation engineer Lee D. Han explains how planners, transit agencies, and city governments anticipate and manage these disruptions.

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Spotify will axe almost a fifth of its workforce after warning that economic growth had slowed dramatically and it needed to cut costs as the music streaming giant seeks to turn subscriber growth into consistent profitability.

In a memo to staff on Monday, chief executive Daniel Ek said Spotify would cut about 17 percent of its global workforce, about 1,500 people. Spotify employs more than 9,000 people worldwide.

“I recognize this will impact a number of individuals who have made valuable contributions,” Ek said. “To be blunt, many smart, talented, and hard-working people will be departing us.”

Virgin Galactic founder Richard Branson. (credit: Eric Berger)

Sir Richard Branson has ruled out putting more money into his lossmaking space travel company Virgin Galactic, saying his business empire “does not have the deepest pockets” any more.

Virgin Galactic, which was founded by Branson in 2004, last month announced it was cutting jobs and suspending commercial flights for 18 months from next year, in a bid to preserve cash for the development of a larger plane that could carry passengers to the edge of space.

The group has said it has enough funding to carry it through to 2026, when the bigger Delta vehicle is expected to enter service. But some analysts are expecting Galactic to ask investors for more money in about 2025.

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One of the world’s most peculiar test beds stretches above Princeton, New Jersey. It’s a fiber optic cable strung between three utility poles that then runs underground before feeding into an “interrogator.” This device fires a laser through the cable and analyzes the light that bounces back. It can pick up tiny perturbations in that light caused by seismic activity or even loud sounds, like from a passing ambulance. It’s a newfangled technique known as distributed acoustic sensing, or DAS.

Because DAS can track seismicity, other scientists are increasingly using it to monitor earthquakes and volcanic activity . (A buried system is so sensitive, in fact, that it can detect people walking and driving above .) But the scientists in Princeton just stumbled upon a rather … noisier use of the technology. In the spring of 2021, Sarper Ozharar—a physicist at NEC Laboratories, which operates the Princeton test bed—noticed a strange signal in the DAS data . “We realized there were some weird things happening,” says Ozharar. “Something that shouldn’t be there. There was a distinct frequency buzzing everywhere.”

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A federal judge has stopped a US state’s landmark ban on TikTok from going into effect, in an important test case for the widespread political backlash that has grown in the country against the Chinese-owned video-sharing app.

Montana’s Senate Bill 419, which was signed by the state’s Republican governor, Greg Gianforte, in May, would have gone into effect in January and imposed a ban on downloads of the app.

On Thursday, Judge Donald Molloy granted TikTok’s request for a preliminary injunction after the ByteDance-owned app challenged the legislation in court, denouncing it as an unconstitutional infringement of its rights. Some users of the app also joined the legal challenge.

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In late 2020, Huawei was fighting for its survival as a mobile phone maker.

A few months earlier, the Trump administration had hit the Chinese company with crippling sanctions, cutting it off from global semiconductor supply chains.

The sanctions prevented anyone without a permit from making the chips Huawei designed, and the company was struggling to procure new chips to launch more advanced handsets.