Slashdot reader AltMachine writes: In October 2019, Google said its Sycamore processor was the first to achieve quantum supremacy by completing a task in three minutes and 20 seconds that would have taken the best classical supercomputer, IBM's Summit, 10,000 years. That claim — particularly how Google scientists arrived at the "10,000 years" conclusion — has been questioned by some researchers, but the counterclaim itself was not definitive.

Now though, in a paper to be submitted to a scientific journal for peer review, scientists at the Institute of Theoretical Physics under the Chinese Academy of Sciences said their algorithm on classical computers completed the simulation for the Sycamore quantum circuits [possibly paywalled; alternative source of the same article] "in about 15 hours using 512 graphics processing units (GPUs)" at a higher fidelity than Sycamore's. Further, the team said "if our simulation of the quantum supremacy circuits can be implemented in an upcoming exaflop supercomputer with high efficiency, in principle, the overall simulation time can be reduced to a few dozens of seconds, which is faster than Google's hardware experiments".

As China unveiled a photonic quantum computer which solved a Gaussian boson sampling problem in 200 seconds that would have taken 600 million years on classical computer, in December 2020, disproving Sycamore's claim would place China being the first country to achieve quantum supremacy.

Research studying the possibility of electrifying rail-based freight "finds that the technology is pretty much ready," reports Ars Technica, "and under the right circumstances, the economics are on the verge of working out."

It helps that the price of batteries have dropped 87% over the last decade: In the U.S., the typical freight car travels an average of 241 kilometers per day when in operation. So the researchers created a battery big enough to move that distance as part of a large freight train (four locomotives, 100 freight cars, and about 7,000 tonnes of payload). They found that lithium ferrous phosphate would let each of the four locomotives be serviced by a single freight car configured as a giant battery. The battery would only occupy 40 percent of the volume of a typical boxcar and would be seven tonnes below the weight limit imposed by existing bridges. Because of the efficiency of direct electric power, the train would use only half the energy consumed by an internal combustion engine driving an on-board generator...

Using an economic measure called the "net present value," the researchers determine that switching to batteries alone would cost $15 billion. But taking the pollution damages into account turns the number into a $44 billion savings. Considering climate damages as well boosts the savings to $94 billion. Even if these damages are ignored, a rise in the price of diesel and allowing freight companies to buy power at wholesale rates come close to shifting the costs to neutral... [F]reight companies could use their capacity to provide grid stabilization services or sell back power when the price gets high. In extreme cases, this system could actually pay for the entire infrastructure.

"Preliminary estimates of the most expensive 90 hours per year in the ERCOT [Texas] market, for example, show that batteries could be discharged at $200/kWh, potentially generating enough revenue to pay for the upfront battery cost in a single year," the study says.
Special thanks to clovis (Slashdot reader #4,684) for the submission — and for also sharing "some general info about diesel-electric locomotives" and "some detail on the AC-DC-AC drive."

SiliconANGLE reports on why investors poured another $250 million into Cerebras Systems Inc: Enterprises typically use graphics processing units in their AI projects. The fastest GPU on the market today features about 54 billion transistors. Cerebras Systems' chip, the WSE-2, includes 2.6 trillion transistors that the startup says make it the "fastest AI processor on Earth."

WSE-2 stands for Wafer Scale Engine 2, a nod to the unique architecture on which the startup has based the processor. The typical approach to chip production is carving as many as several dozen processors into a silicon wafer and then separating them. Cerebras Systems is using a vastly different method: The startup carves a single large processor into the silicon wafer that isn't broken up into smaller units.

The 2.6 trillion transistors in the WSE-2 are organized into 850,000 cores...

Cerebras Systems says that the WSE-2 has 123 times more cores and 1,000 times more on-chip memory than the closest GPU. The chip's impressive specifications translate into several benefits for customers, according to the startup, most notably increased processing efficiency. To match the performance provided by a WSE-2 chip, a company would have to deploy dozens or hundreds of traditional GPU servers... With the WSE-2, data doesn't have to travel between two different servers but only from one section of the chip to another, which represents a much shorter distance. The shorter distance reduces processing delays. Cerebras Systems says that the result is an increase in the speed at which neural networks can run.

North Dakota has just 266 electric cars, the fewest of any state in America, reports the Washington Post. But the state's biggest booster for electric cars may be: the coal industry: The thinking is straightforward: More electric cars would mean more of a market for the [lower carbon] lignite coal that produces most of North Dakota's electricity, and if a long-shot project to store carbon emissions in deep underground wells works out, it might even result in cleaner air as well. "EVs will be soaking up electricity," said Jason Bohrer, head of a coal trade group that has launched a statewide campaign to promote electric vehicles and charging stations along North Dakota's vast distances. "So coal power plants, our most resilient and available power plants, can continue to be online...."

In North Dakota, Wyoming, West Virginia — and in the nine other states where coal is the main fuel for electric power plants — electric cars will still rely on the combustion of ancient carbon-based deposits for their energy unless other sources of power come to the fore... [C]oal remains by far the main fuel for power plants worldwide, and a recent surge in its price suggests that demand is not waning. Without an intensive turn to carbon capture — a technically feasible but commercially unproven technology — electric vehicles may not be able to make that much of a difference in the effort to reduce greenhouse gas emissions... [A] carbon capture experiment at the Milton R. Young Generation Station adjacent to the BNI mine, devised by a partnership of scientists and the Minnkota Power Cooperative, could make coal more attractive in the clean-energy future — if it works. The idea, known as Project Tundra, is to scrub the carbon dioxide out of the plant's exhaust smoke, condense it and inject it into deep wells...

Carbon capture has been a popular idea within the coal, oil and gas sectors for years now. The technology is not out of reach. Plenty of pilot projects have been launched. But so far no one has been able to make it a paying proposition. A pioneering $7.5 billion carbon capture power plant in Mississippi was razed with dynamite on Oct. 9 after its owners wrote it off as an 11-year-old economic failure. North Dakota hopes to break through that last barrier, for both coal and oil... If Project Tundra can show that stuffing carbon dioxide back into the earth is economically feasible, he said, "it's opening the door for a CO2 economy. It gives the lignite [coal] industry a way to survive." His group has launched a promotional campaign called Drive Electric North Dakota, which sponsors promotional events, conducts public attitude surveys and lobbies for EVs in the state capital...

Clean-air advocates range from dubious to dismissive. The promise of electric vehicles wasn't that they would spur more coal mining — or oil extraction...

And unproven though it may be, critics contend, the publicity surrounding carbon capture has created a false sense of complacency that world-changing solutions are just around the corner.
The Post also reports that "the oil sector, too, is putting its chips on carbon capture... "

"Texans will be paying for the effects of last February's cold snap for decades to come," reports Ars Technica, "as the state's oil and gas regulator approved a plan for natural gas utilities to recover $3.4 billion in debt they incurred during the storm.

"The regulator, the Railroad Commission, is allowing utilities to issue bonds to cover the debt. As a result, ratepayers could see an increase in their bills for the next 30 years." During the winter storm, natural gas prices spiked as cold temperatures drove demand up while also depressing supply... The governor's office knew of the looming shortages days before they happened, yet the preparations they made did little to alter the course of the disaster... Gas sellers made record profits in just a few days, together bringing in as much as $11 billion, about 70-100 times more than normal, based on spot prices at the time. Meanwhile, many Texans suffered through blackouts and bitter cold, and 210 people died, according to the latest estimate from the Texas Department of State Health Services.

In the wake of the storm, many officials have called on utilities and oil and gas companies to winterize their operations...

Texans aren't the only ones whose bills are higher as a result of producers' and utilities' unwillingness to winterize their equipment. Utilities around the country were forced to buy natural gas at significantly higher prices when Texas' markets went haywire as a result of low supply and high demand. Ratepayers as far away as Minnesota will be paying surcharges for years to come after their utilities had to pay $800 million more than expected for natural gas.
The article also includes a quote from Katie Sieben, chairwoman of the Minnesota Public Utility Commission, from an April article in The Washington Post.

"It is maddening and outrageous and completely inexcusable that Texas' lack of sound utility regulation is having this impact on the rest of the country."

The Apple-1, one of Apple's first computers, fetched $400,000 at auction in the U.S. earlier this week. Slashdot reader schwit1 first shared the news with us. The BBC reports: The rare Hawaiian koa wood-cased Apple-1 -- still functioning -- is one of only 200 made and sold in kit form. The computer has only had two owners, a college professor and his student to whom he sold the machine for $650, said John Moran Auctioneers in California. The sale included user manuals and Apple software on two cassette tapes.

The koa wood case of the auctioned model was added by a pioneering early computer retailer, ByteShop, in California, which took delivery of around 50 of the Apple-1 machines. In 1976, the machines were sold for $666.66, reportedly because Wozniak liked repeating numbers. It is believed there are around 20 such computers in the world still capable of functioning. The auctioned machine is not the highest-grossing Apple-1 computer -- that distinction belongs to a working version that sold for $905,000 at a Bonhams auction in New York in 2014.

An anonymous reader quotes a report from CNN: Companies in North America added a record number of robots in the first nine months of this year as they rushed to speed up assembly lines and struggled to add human workers. Factories and other industrial users ordered 29,000 robots, 37% more than during the same period last year, valued at $1.48 billion, according to data compiled by the industry group the Association for Advancing Automation. That surpassed the previous peak set in the same time period in 2017, before the global pandemic upended economies.

The rush to add robots is part of a larger upswing in investment as companies seek to keep up with strong demand, which in some cases has contributed to shortages of key goods. At the same time, many firms have struggled to lure back workers displaced by the pandemic and view robots as an alternative to adding human muscle on their assembly lines. Robots also continue to push into more corners of the economy. Auto companies have long bought most industrial robots. But in 2020, combined sales to other types of businesses surpassed the auto sector for the first time -- and that trend continued this year. In the first nine months of the year, auto-related orders for robots grew 20% to 12,544 units, according to A3, while orders by non-automotive companies expanded 53% to 16,355.

An anonymous reader quotes a report from TechRadar: Seagate has unveiled the first ever hard disk drive (HDD) that utilizes both the NVMe protocol and a PCIe interface, which have historically been used for solid state drives (SSDs) exclusively. As explained in a company blog post, the proof-of-concept HDD is based on a proprietary controller that plays nice with all major protocols (SAS, SATA and NVMe), without requiring a bridge. The NVMe HDD was demoed at the Open Compute Compute Project Summit in a custom JBOD enclosure, with twelve 3.5-inch drives hooked up via a PCIe interface. Although the capacity of the drive is unconfirmed, Seagate used images of the Exos X18 for the presentation, which has a maximum capacity of 18TB.

According to Seagate, there are a number of benefits to bringing the NVMe protocol to HDDs, such as reduced total cost of ownership (TCO), performance improvements, and energy savings. Further, by creating consistency across different types of storage device, NVMe HDDs could drastically simplify datacenter configurations. While current HDDs are nowhere near fast enough to make full use of the latest PCIe standards, technical advances could mean SATA and SAS interfaces are no longer sufficient in future. At this juncture, PCIe NVMe HDDs may become the default. That said, it will take a number of years for these hard drives to enter the mainstream. Seagate says it expects the first samples to be made available to a small selection of customers in Autumn next year, while full commercial rollout is slated for 2024 at the earliest.

An anonymous reader quotes a report from Ars Technica: Microsoft is taking the fight to Chromebooks in schools with the $250 Surface Laptop SE, but inexpensive hardware is only part of the equation. One reason Chromebooks have succeeded in education is because of Chrome OS, which is well-suited for lower-end hardware, easy for IT administrators to manage, and hard to break with errant apps or malware. Microsoft's answer to Chrome OS is Windows 11 SE. Unlike past efforts like Windows in S mode (which is still its own separate thing), Windows 11 SE isn't just a regular version of Windows with a cheaper license or a cut-down version that runs fewer apps. Windows 11 SE defaults to saving all files (including user profile information) to students' OneDrive accounts, and it has had some standard Windows 11 features removed to ensure a "distraction-free" learning environment that performs better on low-end devices. The operating system also gives IT administrators exclusive control over the apps and browser extensions that can be installed and run via Microsoft Intune.

If you're a school IT administrator with a fleet of PC laptops or desktops, you might wonder if you can buy and install Windows 11 SE on hardware you already have so you can benefit from its changes without buying new hardware. The answer, Microsoft tells us, is no. The only way to get Windows 11 SE is on laptops that ship with Windows 11 SE. And if you re-image a Windows 11 SE device with a different version of Windows 10 or Windows 11, it won't even be possible to reinstall Windows 11 SE after that. [...] Microsoft has published documentation (PDF) that more fully explains the differences between Windows 11 SE and the other editions of Windows (including Windows in S mode).

Valve has delayed the release of its Steam Deck handheld by several months, it announced in a statement today. The anticipated handheld will now start rolling out in February 2022, pushed back from an initial December release. Kotaku reports: "We're sorry about this -- we did our best to work around the global supply chain issues, but due to material shortages, components aren't reaching our manufacturing facilities in time for us to meet our initial launch dates," Valve wrote. "Based on our updated build estimates, Steam Deck will start shipping to customers February 2022. This will be the new start date of the reservation queue -- all reservation holders keep their place in line but dates will shift back accordingly." Further reading: Valve Launches Steam Deck, a $400 PC Gaming Portable

Apple says it will back off its plan to break Face ID on independently repaired iPhones. Ars Technica reports: The company's often contentious relationship with the repair community was tested again when "unauthorized" iPhone 13 screen replacements started resulting in broken Face ID systems. A new report from The Verge says that Apple "will release a software update that doesn't require you to transfer the microcontroller to keep Face ID working after a screen swap." Screen replacements are the most common smartphone repairs. Apple included a new microcontroller in the iPhone 13's display that pairs each screen with other components in the phone. As iFixit reported, if a third-party repair shop replaced the iPhone 13 display, Apple would disable the phone's Face ID system. [...] After a wave of bad press, it's "crisis averted" for the repair community. It would be nice if this was never an issue in the first place, though.

An anonymous reader quotes a report from Motherboard: Just outside of Shiprock, New Mexico, on land belonging to the Navajo Nation, a Bitcoin mine owned and operated by a Canadian investment company consumes seven megawatts of power each month -- enough to power 19,600 homes. The operation is run by a firm called WestBlock Capital and mines between 23 and 25 bitcoins per month, equivalent to roughly $1.4 to $1.6 million USD, with a majority of its power coming from renewable solar energy. According to a press release from the mine's parent company, Luxxfolio, the mine accesses these resources "at significantly reduced cost in the bottom decile of global power costs."

But all around the mine, Dine -- citizens of the Navajo Nation -- live without electricity or running water in their homes. The Navajo Tribal Utility Authority (NTUA), the nation's non-profit utility enterprise that initially partnered with Calgary, Alberta blockchain company WestBlock on the mine project, is working to connect more homes on the nation to basic utilities. A short documentary detailing the project by Bitcoin mining hosting company Compass was released last week, framing the mine as a means to achieve sovereignty and economic prosperity for the nation. But some Dine are bristling at the idea of a foreign Bitcoin mining company getting access to dirt cheap electricity while residents in Navajo Nation live without basic utilities like power and running water.

Tyler Puente, who commented on a since-deleted Facebook post from Navajo Nation President Jonathan Nez's Facebook page about the mine's groundbreaking ceremony that Navajo leadership are allowing outsiders to take advantage of Dine, told Motherboard that he sees the Bitcoin mine as a form of "financial colonialism." "I think Bitcoin companies prey on communities like my own," said Puente. "My perspective is that we're being used." To some Dine, WestBlock project resembles a form of crypto-colonialism, a term that describes the exploitation of lands and resources by cryptocurrency and blockchain interests, often under the guise of progressive or egalitarian rhetorics for the host communities.

PolygamousRanchKid shares a report from the BBC: Rolls-Royce has been backed by a consortium of private investors and the UK government to develop small nuclear reactors to generate cleaner energy. The creation of the Rolls-Royce Small Modular Reactor (SMR) business was announced following a [195 million pound] cash injection from private firms and a [210 million pound] grant from the government. It is hoped the new company could create up to 40,000 jobs by 2050. However, critics say the focus should be on renewable power, not new nuclear.

Rolls-Royce SMR said one of its power stations would occupy about one tenth of the size of a conventional nuclear plant -- the equivalent footprint of two football pitches -- and power approximately one million homes. The firm said a plant would have the capacity to generate 470MW of power, which it added would be the same produced by more than 150 onshore wind turbines. Warren East, Rolls-Royce chief executive, said the company's SMR technology offered a "clean energy solution" which help tackle climate change.

However, Paul Dorfman, chairman of the Nuclear Consulting Group think tank, told the BBC's Today program there was danger that the money spent on nuclear power would hit funding for other power sources. "If nuclear eats all the pies which it is looking to be doing we won't have enough money to do the kind of things we need to do which we know practically and technologically we can do now," he said. Greenpeace's chief scientist Dr Doug Parr said SMRs were still more expensive than renewable technologies and added there was "still no solution to dispose of the radioactive waste they leave behind and no consensus on where they should be located." "What's worse, there's not even a prototype in prospect anytime soon," he added. "The immediate deadline for action is sharp cuts in emissions by 2030, and small reactors will have no role in that."

An anonymous reader quotes a report from Ars Technica: Disney+'s next major app update, coming to all devices later this week, continues the service's latest efforts to please nitpicky A/V obsessors with a new screen ratio format meant to fill more of your HDTV screen in a way that filmmakers originally intended. "IMAX Digital" is coming to all devices that support Disney+ starting this Friday as part of the service's "Disney+ Day" promotion. This "17.1:9" format will land exclusively on 13 Marvel Studios films to start, and the move coincides with the streaming premiere of Shang-Chi and the Legend of the Ten Rings -- a film that skipped Disney's experiment with simultaneous launches in theaters and on Disney+ earlier this year. When a film switches to an IMAX Digital ratio, the usual black bars that signify a wider-screen 21:9 ratio will be reduced, adding approximately 26 percent more image to your HDTV, all framed as originally intended. The full list of IMAX Digital-compatible films coming to Disney+ later this week include: Ant-Man and the Wasp, Avengers: Endgame, Avengers: Infinity War, Black Panther, Black Widow, Captain America: Civil War, Captain Marvel, Doctor Strange, Guardians of the Galaxy, Guardians of the Galaxy Vol. 2, Iron Man, Shang-Chi and the Legend of the Ten Rings, and Thor: Ragnarok.

France will start building its first new nuclear reactors in decades as part of efforts to meet its promises to reduce planet-warming emissions, French President Emmanuel Macron announced Tuesday. The Associated Press reports: He spoke as climate negotiators in Glasgow debate how to speed up efforts against climate change, and amid concerns around Europe about recent spikes in energy prices and the continent's dependence on global gas and oil producers, including Russia. "To guarantee France's energy independence, to guarantee our country's electricity supply, and to reach our goals -- notably carbon neutrality in 2050 -- we will for the first time in decades revive the construction of nuclear reactors in our country, and continue to develop renewable energy," Macron said in a televised address. He did not give any details of the plans.

Microsoft is going head to head with Chromebooks with a new $249 Surface Laptop SE, its most affordable Surface yet. While the software giant has attempted to compete with the popularity of Chrome OS in US schools for years, the Surface Laptop SE is the company's first true Chromebook competitor. From a report: Surface Laptop SE will be sold exclusively to schools and students, starting at $249. It's part of a much broader effort with Windows 11 SE, a new student edition designed to compete with Chrome OS that will ship on a range of low-cost laptops in the coming months. Surface Laptop SE is every bit the low-cost Windows device you'd expect to see for $249.

While it retains the same keyboard and trackpad found on Microsoft's Surface Laptop Go, the all-plastic body houses an 11.6-inch display running at just a 1366 x 768 resolution. This is the first 16:9 Surface device in more than seven years, after Microsoft switched to 3:2 for its Surface line with the Surface Pro 3 launch in 2014. The screen looks like the biggest drawback on this device, particularly as we weren't fans of the low-resolution screen (1536 x 1024) found on the $549 Surface Laptop Go. Lenovo's Chromebook Duet ships with a better 10.1-inch (1920 x 1200) display for the same $249 price as the Surface Laptop SE. Intel's Celeron N4020 or N4120 power the Surface Laptop SE, combined with 4GB / 8GB of RAM and 64GB or 128GB of eMMC storage.

Japan will create a scheme to subsidize construction of domestic chip factories with a new plant planned by Taiwan's TSMC likely to be the first recipient, the Nikkei newspaper reported on Monday. Reuters reports: The government will set aside several hundreds of billion yen under this year's supplementary budget to create a pool of funds at NEDO, a state-run body promoting research and development on energy and industrial technology, the paper said. Companies will be eligible for the subsidies on condition they ramp up chip production in times of short supply, the Nikkei said without citing sources.

The government is likely to subsidise up to half of TSMC's estimated 1-trillion-yen ($8.82 billion) investment for building a chip plant in Kumamoto, southern Japan, the Nikkei said. The plant in Kumamoto, southern Japan, is expected to produce semiconductors for automobiles, camera image sensors and other products which have been hit by a global chip shortage, and is likely to start operations by 2024, the paper said.

On Friday, a transparency activist group known as Distributed Denial of Secrets (DDoSecrets) posted a 1.8-terabyte trove of police helicopter footage to its website. "DDoSecrets cofounder Emma Best says that her group doesn't know the identity of the source who shared the data and that no affiliation or motivation for leaking the files was given," reports Wired. "The source simply said that the two police departments were storing the data in unsecured cloud infrastructure." Techdirt reports: The DDoS release shows law enforcement agencies aren't just deploying choppers to keep an eye on suspects in motion. They're also using them to engage in extended surveillance of people suspected of nothing, hovering over large gatherings and deploying infrared cameras to peer inside of buildings just for the fuck of it. Putting your stuff in the cloud means opening up additional attack vectors for those seeking your secrets. That appears to be the root source of this new leak. What a time to be alive!

Talking at the Web Summit in Lisbon, Arm CEO Simon Segars said this chip-supply crisis was the worst he'd ever seen (according to an EE Times article shared by Slashdot reader dkatana): The most important thing to do to get out of the woods in this situation and minimize similar ones in the future, he argued, is to improve collaboration between all players in the ecosystem. "We need better collaboration across all players in the supply chain. So, make sure we understand the bottlenecks and build resilience into this supply chain in a steady state that works okay. But when you get an event and obviously the pandemic was a Black Swan event, like no other, it froze things off the hillside, and it's very hard to recover."

Segars is optimistic that current and future investments would ease the supply chain in the short term, but he is also cautious about not creating huge expectations. "About $2 billion a week is going to be spent for the next couple of years to add capacity and build new facilities. And that's going to add about 50 percent additional capacity over the next five years...."

Segars predicted next year's Christmas might be much better for gift givers, but that consumers might still consider starting shopping early. And prices might not come down for a while. What is essential, Segars said, is to be patient, collaborate and invest. "Where are we going to be next Christmas? I expect these supply chain constraints to be a little better, but [they] won't be completely fixed because this isn't a short-term problem with a short-term solution. Billions of dollars are going to need to be spent in the coming years. And the decisions that we make today are going to affect the supply of this life, critical materials, semiconductors, over the next decade.

"Will we get this right? Will we spend enough? We spent too much, but we accidentally break the industries? That remains to be seen. That is the challenge that the industry is stepping up to" he added. "And in collaboration, across suppliers and customers and governments, we absolutely have to get it right!"
Segars also pointed out that it's hard to expand wafer production because there's so many different chemicals involved. "I mean virtually the whole periodic table that is used in making semiconductors. You need industrial style, very pure chemicals to feed into these factories downstream... So you need much more than just a chip factory to address these supply chain issues."

"In the early hours of October 30, 1961, a bomber took off from an airstrip in northern Russia and began its flight through cloudy skies over the frigid Arctic island of Novaya Zemlya," writes the Bulletin of the Atomic Scientists. Slashdot reader DanDrollette (who is also the deputy editor of The Bulletin of the Atomic Scientists) shares their report on "The secret history of the world's largest nuclear detonation, coming to light after 60 years." Slung below the plane's belly was a nuclear bomb the size of a small school bus — the largest and most powerful bomb ever created.

At 11:32 a.m., the bombardier released the weapon. As the bomb fell, an enormous parachute unfurled to slow its descent, giving the pilot time to retreat to a safe distance. A minute or so later, the bomb detonated. A cameraman watching from the island recalled:

A fire-red ball of enormous size rose and grew. It grew larger and larger, and when it reached enormous size, it went up. Behind it, like a funnel, the whole earth seemed to be drawn in. The sight was fantastic, unreal, and the fireball looked like some other planet. It was an unearthly spectacle...!

Within ten minutes, it had reached a height of 42 miles and a diameter of some 60 miles. One civilian witness remarked that it was "as if the Earth was killed." Decades later, the weapon would be given the name it is most commonly known by today: Tsar Bomba, meaning "emperor bomb...." at 50 megatons, it was more than 3,300 times as powerful as the atomic bomb that killed at least 70,000 people in Hiroshima, and more than 40 times as powerful as the largest nuclear bomb in the US arsenal today. Its single test represents about one tenth of the total yield of all nuclear weapons ever tested by all nations...

Within two years, though, the Soviet Union and the United States would sign and ratify the Limited Test Ban Treaty, prohibiting atmospheric nuclear weapons testing, and the 50-megaton bomb would fall into relative obscurity.
Drollette notes that "The United States dismissed the gigantic Tsar Bomba as a stunt, but behind the scenes it was working to build a 'superbomb' of its own."

The article argues there a lesson for our times in the 1961 episode, calling it "a potent example of how nationalism, fear, and high-technology can combine in a fashion that is ultimately dangerous, wasteful, and pointless."