A little while back, we took a look at a large cargo bike from Urban Arrow that had some interesting features: a drive train that sported continuous variable gearing and a belt drive. But it was difficult to get a feel for what using that drivetrain was like when it was being used to shift a large and extremely heavy cargo bike. So, I jumped at the opportunity when Urban Arrow’s sister company, Gazelle, offered a chance to ride one of its new Arroyo models , which feature the same drivetrain, but this time coupled to a fairly standard commuter bike.

Getting rid of all the weight and bulk really allowed the drive system to shine. And, as with its cargo-carrying cousin, the bike is filled with thoughtful touches and design decisions that make riding it a pleasure. But all that comes at a cost: This is a premium bike with little in the way of compromises, and it’s priced accordingly.

High-end hardware

The Arroyo line is meant for commuters and urban/suburban riding. It has a step-through frame, a large rack, fenders, and its riding stance is very upright. In keeping with its Dutch heritage, it’s meant to be ridden as a bicycle, rather than a bike-like scooter. There’s no throttle to let you avoid pedaling, and even when it’s set to its maximum assist rating, you’ll end up putting in a reasonable amount of effort during the ride. If you’re looking for something that lets you handle a commute in hot weather without sweating, you’ll probably want to look elsewhere.

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A measles outbreak that began in South Carolina at the start of October is showing no signs of slowing as officials on Tuesday reported 27 new cases since Friday. Those cases bring the outbreak total to 111.

The southern state’s outbreak now rivals outbreaks ongoing in Utah and Arizona , which have tallied 115 and 176 cases, respectively. The outbreaks are threatening to cost the country its measles elimination status , which was earned in 2020 after vaccination efforts stopped the virus from spreading continuously. If the current transmission of the virus isn’t halted by January, the virus will have circulated for 12 consecutive months, marking it once again as an endemic disease in the US.

In an update on Tuesday , South Carolina’s health department suggested the spread is far from over. Of the state’s 27 new cases, 16 were linked to exposure at a church, the Way of Truth Church in Inman. And amid the new cases, new exposures were identified at Inman Intermediate School. That’s on top of exposures announced Friday at four other schools in the region, which led to well over 100 students being quarantined.

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Big Tech has spent the past year telling us we’re living in the era of AI agents, but most of what we’ve been promised is still theoretical. As companies race to turn fantasy into reality, they’ve developed a collection of tools to guide the development of generative AI. A cadre of major players in the AI race, including Anthropic, Block, and OpenAI, has come together to promote interoperability with the newly formed Agentic AI Foundation (AAIF). This move elevates a handful of popular technologies and could make them a de facto standard for AI development going forward.

The development path for agentic AI models is cloudy to say the least, but companies have invested so heavily in creating these systems that some tools have percolated to the surface. The AAIF, which is part of the nonprofit Linux Foundation, has been launched to govern the development of three key AI technologies: Model Context Protocol (MCP), goose, and AGENTS.md.

MCP is probably the most well-known of the trio, having been open-sourced by Anthropic a year ago. The goal of MCP is to link AI agents to data sources in a standardized way—Anthropic (and now the AAIF) is fond of calling MCP a “ USB-C port for AI .” Rather than creating custom integrations for every different database or cloud storage platform, MCP allows developers to quickly and easily connect to any MCP-compliant server.

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The Supreme Court’s conservative justices appear ready to overturn a 90-year-old precedent that said the president cannot fire a Federal Trade Commission member without cause. A ruling for Trump would give him more power over the FTC and potentially other independent agencies such as the Federal Communications Commission.

Former FTC Commissioner Rebecca Kelly Slaughter, a Democrat, sued Trump after he fired both Democrats from the commission in March. Slaughter’s case rests largely on the 1935 ruling in Humphrey’s Executor v. United States , in which the Supreme Court unanimously held that the president can only remove FTC commissioners for inefficiency, neglect of duty, or malfeasance in office.

Chief Justice John Roberts said during yesterday’s oral arguments that Humphrey’s Executor is a “dried husk” despite being the “primary authority” that Slaughter’s legal team is relying on. Roberts said the court’s 2020 ruling in Seila Law made it “pretty clear… that Humphrey’s Executor is just a dried husk of whatever people used to think it was because, in the opinion itself, it described the powers of the agency it was talking about, and they’re vanishingly insignificant, have nothing to do with what the FTC looks like today.”

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B-9 had Will Robinson. Twiki had Buck Rogers. And, of course, C-3PO and R2-D2 had Luke Skywalker. Now, in a scenario straight out of science fiction, MAPP will have whoever NASA names to the crew of the second Artemis mission to land on the moon.

The space agency has selected Lunar Outpost’s Mobile Autonomous Prospecting Platform, or MAPP, to become the first robotic rover to operate on the moon alongside astronauts . Although its tasks will be far simpler than those of the robots seen on TV and in the movies, the autonomous four-wheeled MAPP will help scientists learn more about the crew’s surroundings. Science instruments on the rover will characterize the surface plasma and behavior of the dust in the lunar environment.

“The Apollo era taught us that the further humanity is from Earth, the more dependent we are on science to protect and sustain human life on other planets,” said Nicky Fox, NASA’s associate administrator for science, in a statement. “By deploying these… science instruments on the lunar surface, our proving ground, NASA is leading the world in the creation of humanity’s interplanetary survival guide to ensure the health and safety of our spacecraft and human explorers as we begin our epic journey back to the Moon.”

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On Monday, US District Court Judge Patti Saris vacated a Trump executive order that brought a halt to all offshore wind power development, as well as some projects on land. That order had called for the suspension of all permitting for wind power on federal land and waters pending a review of current practices. This led states and an organization representing wind power companies to sue, claiming among other things that the suspension was arbitrary and capricious.

Over 10 months since the relevant government agencies were ordered to start a re-evaluation of the permitting process, testimony revealed that they had barely begun to develop the concept of a review. As such, the only reason they could offer in defense of the suspension consisted of Trump’s executive order and a Department of the Interior memo implementing it. “Whatever level of explanation is required when deviating from longstanding agency practice,” Judge Saris wrote, “this is not it.”

Lifting Trump’s suspension does not require the immediate approval of any wind projects. Instead, the relevant agencies are likely to continue following Trump’s wishes and slow-walking any leasing and licensing processes, which may force states and project owners to sue individually. But it does provide a legal backdrop for any suits that ultimately occur, one in which the government’s actions have little justification beyond Trump’s personal animosity toward wind power.

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Long ago, Google’s Android-powered wearables had hands-free navigation gestures. Those fell by the wayside as Google shredded its wearable strategy over and over, but gestures are back, baby. The Pixel Watch 4 is getting an update that adds several gestures, one of which is straight out of the Apple playbook .

When the update hits devices, the Pixel Watch 4 will gain a double pinch gesture like the Apple Watch has. By tapping your thumb and forefinger together, you can answer or end calls, pause timers, and more. The watch will also prompt you at times when you can use the tap gesture to control things.

In previous incarnations of Google-powered watches, a quick wrist turn gesture would scroll through lists. In the new gesture system, that motion dismisses what’s on the screen. For example, you can clear a notification from the screen or dismiss an incoming call. Pixel Watch 4 owners will also enjoy this one when the update arrives.

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Despite claims of environmental leadership and promises to preserve the Amazon rainforest ahead of COP30, Brazil is stripping away protections for the region’s vital ecosystems faster than workers dismantled the tents that housed the recent global climate summit in Belém.

On Nov. 27, less than a week after COP30 ended, a powerful political bloc in Brazil’s National Congress, representing agribusiness, and development interests, weakened safeguards for the Amazon’s rivers, forests, and Indigenous communities.

The rollback centered on provisions in an environmental licensing bill passed by the government a few months before COP30. The law began to take shape well before, during the Jair Bolsonaro presidency from 2019 to 2023. It reflected the deregulatory agenda of the rural caucus, the Frente Parlamentar da Agropecuária , which wielded significant power during his term and remains influential today.

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Back in 2023, we reported on MIT scientists’ conclusion that the ancient Romans employed “hot mixing” with quicklime, among other strategies, to make their famous concrete, giving the material self-healing functionality. The only snag was that this didn’t match the recipe as described in historical texts. Now the same team is back with a fresh analysis of samples collected from a recently discovered site that confirms the Romans did indeed use hot mixing, according to a new paper published in the journal Nature Communications.

As we’ve reported previously , like today’s Portland cement (a basic ingredient of modern concrete), ancient Roman concrete was basically a mix of a semi-liquid mortar and aggregate. Portland cement is typically made by heating limestone and clay (as well as sandstone, ash, chalk, and iron) in a kiln. The resulting clinker is then ground into a fine powder with just a touch of added gypsum to achieve a smooth, flat surface. But the aggregate used to make Roman concrete was made up of fist-sized pieces of stone or bricks.

In his treatise De architectura (circa 30 CE), the Roman architect and engineer Vitruvius wrote about how to build concrete walls for funerary structures that could endure for a long time without falling into ruin. He recommended the walls be at least two feet thick, made of either “squared red stone or of brick or lava laid in courses.” The brick or volcanic rock aggregate should be bound with mortar composed of hydrated lime and porous fragments of glass and crystals from volcanic eruptions (known as volcanic tephra).

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