Simulating everything, sort of: The promise and limits of world models
Experts explain how they work, what they can do, and what’s still unsettled.
Samuel Axon
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92
Features
Like a cheat code for your car: We investigate ECU tuning
Now it’s an arms race between OEMs locking down chips and tuners trying to crack them.
Peter Nelson
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180
Payloads used to dictate the terms of launch. That’s finally changing.
“The Starship Pez dispenser demonstrates very smart industrial design and scale.”
Stephen Clark
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149
Hackers can use 9 of the most popular AI tools to assemble massive botnets
“HalluSquatting” weaponizes LLMs’ inability to say “I don’t know.”
Dan Goodin
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64
How AI could enable autonomous robot workers in workplaces—and maybe homes
Top robotics researchers and founders explain how robot autonomy is evolving.
Jeremy Hsu
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189
Despite the darkness, I still see signs of hope in America
It’s difficult to pinpoint the moment in my life where America started to lose the plot.
Eric Berger
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971
Editorial: It’s time to step up and have your say for science
Your comments on a dangerous rule putting politicals in charge of science can matter.
John Timmer
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93
Trump’s plan to redesign every .gov website leads to AI-designed horrors
A year in, National Design Studio delays plan to update government web standards.
Ashley Belanger
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144
Most Read
NASA’s X-59 “frankenjet” tests supersonic flight without the sonic boom
NASA’s quiet supersonic flight tests could eventually go on a national tour.
Jeremy Hsu
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295
Underpromise, overdeliver? Hands-on with the $24,950 Slate auto.
It has 205 miles of bare-bones range.
Roberto Baldwin
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531
How to burst the AI bubble: Strike at its roots
Sci-fi author/tech journalist Cory Doctorow on his new book, The Reverse Centaur’s Guide to Life After AI.
Jennifer Ouellette
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290
This former hacker saw the light—and now wants to collect all of it
“I don’t know of a bigger question we can answer as humans.”
Eric Berger
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99
As global warming threatens corals, scientists search for reefs that can take the heat
Researchers say these coral strongholds may help repopulate more degraded reefs.
Inside Climate News
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42
Hunter-gatherers in Siberia died of a plague outbreak 5,500 years ago
We can’t blame the Neolithic Transition for the plague anymore.
Kiona N. Smith
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53
The Ars Technica 2026 Reader Survey: Let your voice be heard!
Tell us how you read Ars, and what you’d like to see more (or less!) of on the front page.
Ken Fisher
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187
20 years of Intel Macs: Why Apple switched, and why it switched again
Remembering the ups and downs of the Intel Mac era as it finally winds down.
Andrew Cunningham
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264
Verizon sent man a refurbished phone with MDM, then deleted his data remotely
Failure raises questions about how Verizon prepares refurbished phones for new users.
Jon Brodkin
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149
Several things I like about macOS 27 Golden Gate that have nothing to do with AI
AI aside, Golden Gate includes a bunch of subtle-but-helpful improvements.
Andrew Cunningham
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160
First Drive: The 2027 Rivian R2 entirely changes the EV game
Rivian’s second EV is the sub-$60,000 R2, and it was worth the wait.
Michael Teo Van Runkle
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374
The weather and climate science AI revolution isn’t revolutionary
Machine learning has its limits—how is it being used?
Scott K. Johnson
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92
Review: AMD’s Radeon RX 9070 GRE is a disappointing way to spend $549
The superior RX 9070 also launched for $549 just over a year ago.
Andrew Cunningham
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75
My SSN was exposed in a breach at Columbia—a school I have no connection with
Columbia admits last year’s data breach exposed victims beyond its students, staff.
Ashley Belanger
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208
How long will it take to rebuild Blue Origin’s launch pad? We asked some SpaceX vets.
“Everyone is in a place where it’s no fun to be there.”
Eric Berger
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131
An OpenAI model solved a famous math problem that stumped humans for 80 years
I tried to explain OpenAI’s solution more clearly than OpenAI did.
Kai Williams
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396
Here’s why the failure of Blue Origin’s New Glenn rocket is so catastrophic
“I hope that it makes it far enough away from the pad that it does not cause pad damage.”
Eric Berger
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435
Amazing interior, controversial exterior: Ferrari’s first electric car
The interior is spectacular; the exterior looks better in person than on screen.
Jonathan M. Gitlin
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364
The $58,000 TV bill: When DirecTV sued O.J. Simpson for piracy
In 2001, the FBI raided O.J.’s house and found smartcards, bootloaders.
Nate Anderson
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104
Yearslong fight over users’ right to tweak smart TV software heads to trial
Access to TV OS’s source code could allow users to limit ads, tracking.
Scharon Harding
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163
The US space enterprise is desperately waiting for Starship—will it finally deliver?
“This is such a wild ride. The highs are high. The lows are low.”
Eric Berger
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272
The perfect commuter bike? Velotric’s Discover M makes its case.
A customized mid-motor and Shimano’s new Cues components are a winning combination.
John Timmer
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127
Motorola Razr Fold review: Fits neatly in your pocket but not your budget
The Razr Fold has a lot going for it, but like all foldables, it’s wildly expensive.
Ryan Whitwam
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65
Twin brothers wipe 96 gov’t databases minutes after being fired
A case study in why credentials are revoked before firings.
Nate Anderson
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206
Sony’s failed war against Internet piracy may doom other copyright lawsuits
Cable firm Cox’s Supreme Court win may help all tech providers, not just ISPs.
Jon Brodkin
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111
The unprecedented and deadly cruise ship hantavirus outbreak, explained
“This is not COVID,” and other reasons why risk to the public is currently low.
Beth Mole
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115
Ars Asks: Share your shell and show us your tricked-out terminals!
A celebration of the tweaks and customizations that make life easier at the CLI.
Lee Hutchinson
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261
Toyota built a $10 billion private utopia—what’s going on in there?
Woven City is a privacy nightmare but could be helpful to an OEM desperate to be more.
TIm Stevens
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224