Heads up, Whovians! We've got a newly regenerated Fifteenth Doctor in Ncuti Gatwa and a new season of the long-running British sci-fi series Doctor Who on the way. Judging by the latest trailer, we're in for another wild ride of time-traveling hijinks, punctuated by an irresistibly charismatic Gatwa sporting some very colorful outfits with confident aplomb.

(Spoilers for most recent seasons and specials below.)

Look, I loved Jodie Whittaker's incarnation of the Doctor , but her tenure was hampered by the unavoidable fact that showrunner Chris Chibnall just didn't give her a lot of great material to work with. Among other issues, there was an unfortunate tendency toward didacticism and preachiness in the writing at the expense of genuine emotional resonance. While there were a number of notable episodes, and Chibnall gamely trotted out all the fan-favorite monsters and tropes, nothing ever fully captured the imagination in quite the same way as the show has always done at its best. Whittaker deserved better.

Enlarge / Russian President Vladimir Putin (L) and Roscosmos Space Corporation Chief Yuri Borisov peruse an exhibit while visiting the Korolev Rocket and Space Corporation Energia, October 26, 2023, in Korolev, Russia. (credit: Contributor/Getty Images)

It has been a terrible decade for the Russian launch industry, which once led the world. The country's long-running workhorse, the Proton rocket, ran into reliability issues and will soon be retired. Russia's next-generation rocket, Angara, is fully expendable and still flying dummy payloads on test flights a decade after its debut. And the ever-reliable Soyuz vehicle lost access to lucrative Western markets after the Russian invasion of Ukraine.

Yet there has been a more fundamental, underlying disease pushing the once-vaunted Russian launch industry toward irrelevance. The country has largely relied on decades-old technology in a time of serious innovation within the launch industry. So what worked at the turn of the century to attract the launches of commercial satellites no longer does against the rising tide of competition from SpaceX, as well as other players in India and China.

Through the first quarter of this year, Russia has launched a total of five rockets, all variants of the Soyuz vehicle. SpaceX alone has launched 32 rockets. China, too, has launched nearly three times as many boosters as Russia.

Enlarge / Teams is being decoupled from the other Office apps worldwide, six months after Microsoft did the same thing for the EU. (credit: Microsoft/Andrew Cunningham)

Months after unbundling the apps in the European Union, Microsoft is taking the Office and Teams breakup worldwide. Reuters reports that Microsoft will begin selling Teams and the other Microsoft 365 apps to new commercial customers as separate products with separate price tags beginning today.

This is a win for other team communication apps like Slack and videoconferencing apps like Zoom, both of which predate Teams but haven't had the benefits of the Office apps' huge established user base.

The separation follows an EU regulatory investigation that started in July of 2023 , almost exactly three years after Slack initially filed a complaint alleging that Microsoft was "abusing its market dominance to extinguish competition in breach of European Union competition law."

Enlarge (credit: Lionel Bonaventure via Getty)

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 / Two cheapo Intel mini PCs, a Raspberry Pi 5, and an Xbox controller for scale. (credit: Andrew Cunningham)

I recently tried to use a Raspberry Pi 5 as a regular desktop PC . The experiment wasn't a failure—I was able to use a Pi to get most of my work done for a few days. But the device's performance, and especially the relative immaturity of the Linux's Arm software ecosystem, meant that there were lots of incompatibilities and rough edges.

One of the problems with trying to use a Pi 5 as a regular desktop computer is that, by the time you've paid for the 8GB version of the board, a decent active cooler and case, and (ideally) some kind of M.2 storage attachment and SSD, you've spent close to a couple of hundred dollars on the system. That's not a ton of money to spend on a desktop PC, but it is enough that the Pi no longer feels miraculously cheap, and there are actually other, more flexible competitors worth considering.

Consider the selection of sub-$200 mini desktop PCs that litter the online storefronts of Amazon and AliExpress. Though you do need to roll the dice on low-to-no-name brands like Beelink, GMKTec, Firebat, BMax, Trigkey, or Bosgame, it's actually possible to buy a reasonably capable desktop system with 8GB to 16GB of RAM, 256GB or 512GB of storage, a Windows 11 license, and a workaday x86-based Intel CPU for as little as $107, though Amazon pricing usually runs closer to $170.

Enlarge / The cheapest version of Volvo's affordable EX30 is rear-wheel drive, but there's no reason to be afraid of that. (credit: Tim Stevens)

Rear-wheel drive cars long ago earned a reputation for being a bit of a nightmare to live with in snowy, icy conditions. That's partly why Volvo stopped making the things way back in the 1990s, so it was a surprise that the brand returned to rear-drive for its latest EVs, like its upcoming subcompact SUV, the EX30.

Why the throwback layout? Next-generation stability and traction-control systems, aided by the precise torque delivery of electric motors, allow for advanced modulation of power and braking that would have been impossible on those '90s icons. To see just how well Volvo's engineers succeeded at the task, I headed to northern Sweden to catch the tail of an Arctic winter and see whether this return to RWD was a success.

The driven wheel dilemma

Thanks to inertia, having the engine of a car drive the rear wheels actually provides the acceleration. When you accelerate, the car's mass effectively shifts rearward. That additional weight on the rear wheels gives them more grip—and gives you more speed.

Enlarge / The SOFIA telescope. (credit: Chris Johnson)

Welcome to the Daily Telescope . There is a little too much darkness in this world and not enough light, a little too much pseudoscience and not enough science. We'll let other publications offer you a daily horoscope. At Ars Technica, we're going to take a different route, finding inspiration from very real images of a universe that is filled with stars and wonder.

Good morning. It's April 1, and today's photo showcases an airplane—but it's a special airplane with some celestial treats in the background.

The plane is a shortened version of a Boeing 747 that housed the Stratospheric Observatory for Infrared Astronomy, known as SOFIA. This airborne observatory first took flight in May 2010 and operated through September 2022. The 2.5-meter telescope flew at about 45,000 feet and observed all manner of phenomena from a vantage point above much of the Earth's atmosphere—celestial magnetic fields, star-forming regions, comets, and more.

Enlarge / Malware Detected Warning Screen with abstract binary code 3d digital concept (credit: Getty Images)

On Friday, researchers revealed the discovery of a backdoor that was intentionally planted in xz Utils, an open-source data compression utility available on almost all installations of Linux and other Unix-like operating systems. The person or people behind this project likely spent years on it. They were likely very close to seeing the backdoor update merged into Debian and Red Hat, the two biggest distributions of Linux when an eagle-eyed software developer spotted something fishy.

"This might be the best executed supply chain attack we've seen described in the open, and it's a nightmare scenario: malicious, competent, authorized upstream in a widely used library," software and cryptography engineer Filippo Valsorda said of the effort, which came frightfully close to succeeding.

Researchers have spent the weekend gathering clues. Here's what we know so far.

Enlarge / The final Delta IV Heavy rocket is seen on the launch pad in Florida. (credit: United Launch Alliance)

Welcome to Edition 6.37 of the Rocket Report! The big story this week is the final launch of the Delta IV Heavy rocket, which is one of the biggest spectacles to enjoy lifting away from the planet. Because of a scrub on Thursday, there is still time to clear your calendar for a second attempt on Friday at 1:37 pm ET in Florida.

As always, we welcome reader submissions , and if you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets as well as a quick look ahead at the next three launches on the calendar.

Orbex patents reusable rocket tech . The British launch company said this week it has patented a "REFLIGHT" technology that enables the recovery of the first stage of its small Prime rocket. Essentially, Orbex designed an interstage that will function somewhat like grid fins on the Falcon 9 rocket's first stage. "After Stage 1 detaches from Stage 2, the interstage on top of Stage 1 reconfigures into four ‘petals’ which fold out and create drag forces that passively reorients and slows the spent rocket stage’s descent to Earth," the company stated.