Kitty Oppenheimer: Can you explain quantum mechanics to me?

J. Robert Oppenheimer: Well, this glass, this drink, this counter top, uhh.. our bodies, all of it. It's mostly empty space. Groupings of tiny energy waves bound together.

Kitty Oppenheimer: By what?

J. Robert Oppenheimer: Forces of attraction strong enough to convince us [that] matter is solid, to stop my body passing through yours.

— IMDB quote from Oppenheimer


Flash forward to 2023, where Mario Barbatti is a theoretical chemist and physicist researching light and molecule interactions. He's also a professor of chemistry at Aix Marseille University in France. Writing this week for Aeon, Barbatti argues that "there are no empty spaces within the atom.

"The empty atom picture is likely the most repeated mistake in popular science." It is unclear who created this myth, but it is sure that Carl Sagan, in his classic TV series Cosmos (1980), was crucial in popularising it. After wondering how small the nuclei are compared with the atom, Sagan concluded that "[M]ost of the mass of an atom is in its nucleus; the electrons are by comparison just clouds of moving fluff. Atoms are mainly empty space. Matter is composed chiefly of nothing." I still remember how deeply these words spoke to me when I heard them as a kid in the early 1980s. Today, as a professional theoretical chemist, I know that Sagan's statements failed to recognise some fundamental features of atoms and molecules...

Misconceptions feeding the idea of the empty atom can be dismantled by carefully interpreting quantum theory, which describes the physics of molecules, atoms and subatomic particles. According to quantum theory, the building blocks of matter — like electrons, nuclei and the molecules they form — can be portrayed either as waves or particles. Leave them to evolve by themselves without human interference, and they act like delocalised waves in the shape of continuous clouds. On the other hand, when we attempt to observe these systems, they appear to be localised particles, something like bullets in the classical realm. But accepting the quantum predictions that nuclei and electrons fill space as continuous clouds has a daring conceptual price: it implies that these particles do not vibrate, spin or orbit. They inhabit a motionless microcosmos where time only occasionally plays a role...

A molecule is a static object without any internal motion. The quantum clouds of all nuclei and electrons remain absolutely still for a molecule with a well-defined energy. Time is irrelevant... Time, however, comes into play when a molecule collides with another one, triggering a chemical reaction. Then, a storm strikes. The quantum steadiness bursts when the sections of the electronic cloud pour from one molecule upon another. The clouds mix, reshape, merge, and split. The nuclear clouds rearrange to accommodate themselves within the new electronic configuration, sometimes even migrating between molecules. For a fraction of a picosecond (10-12 seconds or a billionth of a millisecond), the tempest rages and reshapes the molecular landscape until stillness is restored in the newly formed compounds.

"Hundreds of monster hunters equipped with drones and infrared cameras have gathered in the Scottish Highlands with a singular goal," reports the Washington Post: "to be the ones to finally find the Loch Ness monster." But it won't be easy. On Saturday, the rain was lashing and the skies were gray, hampering visibility in the search for the folkloric creature, affectionately known as Nessie. The mythical monster, which legend says lives in a freshwater lake in Scotland, has eluded capture, or any definitive proof of existence, since its first recorded sighting in the 6th century.

But trying to find Nessie is an age-old tradition, and the volunteer hunters who showed up Saturday are dedicated — and better equipped than those who came before. The search for the monster, organized over two days by the local Loch Ness Center in Inverness, is the biggest in a half-century, and certainly the most high-tech. Some people drove hours to be here, while others flew in from overseas... The Loch Ness Center launched the event — which it called "The Quest" — in partnership with Loch Ness Exploration, a research group that studies the lake and other unexplained phenomena. It put out a call for volunteer hunters "fascinated by the legendary tales of Nessie" and with "a passion for unraveling mysteries and exploring the extraordinary."

The center was later forced to close online registrations for volunteers "due to an overwhelming surge in demand," according to the website...

Some hunters with drones are equipping them with infrared cameras to seek out heat spots in the lake — as well as sending them underwater. They've also come armed with a hydrophone to pick up acoustic signals 60 feet below the loch's surface — although nobody really knows what the monster would sound like. Other participants can join several surface-watch locations staged by organizers or cruise the 23-mile-long lake by boat. They have been asked to document everything they see — from surface movements to weather changes — and are getting lessons on how to capture potential sightings on their phones.
The BBC notes that "Almost 300 have signed up to monitor a live stream from the search, which is taking place on Saturday and Sunday."

NPR has some audio excerpts of past witnesses who said the've seen the monster — and some of the current crop of monster hunters. (While Wikipedia has its own detailed debunking of the famous Loch News monster "Surgeon's Photo".) But the Washington Post sums up the whole story with this two-word quote from a woman who'd traveled from France for a Loch Ness vacation.

"I believe."

In July "Safe Street Rebels" launched the "Week of Cone" pranks (which went viral on TikTok and Twitter). TechCrunch called it "a bid to raise awareness and invite more pissed-off San Franciscans to submit public comments" to regulatory agencies.

But NPR sees a larger context: Coning driverless cars fits in line with a long history of protests against the impact of the tech industry on San Francisco. Throughout the years, activists have blockaded Google's private commuter buses from picking up employees in the city. And when scooter companies flooded the sidewalks with electric scooters, people threw them into San Francisco Bay. "Then there was the burning of Lime scooters in front of a Google bus," says Manissa Maharawal, an assistant professor at American University who has studied these protests.

She points out that when tech companies test their products in the city, residents don't have much say in those decisions: "There's been various iterations of this where it's like, 'Oh, yep, let's try that out in San Francisco again,' with very little input from anyone who lives here...." Waymo is already giving rides in Phoenix and is testing with human safety drivers in Los Angeles and Austin. And Cruise is offering rides in Phoenix and Austin and testing in Dallas, Houston, Miami, Nashville and Charlotte.

Meanwhile, in San Francisco, members of Safe Street Rebel continue to go out at night and stalk the vehicles one cone at a time.
They're apparently bicycling activists, judging by their web site, advocating "for car-free spaces, transit equity, and the end of car dominance." ("We regularly protest the city's thoughtless reopening of the Upper Great Highway to cars by slowing traffic to show just how unnecessary of a route this road is.") Their long-term goal is to expand the group "to the point where we can make a city for people to safely walk, bike and take public transit, not a city dominated by cars..." The last half-century has been a failed experiment with car dominance. They bankrupt our cities, ruin our environment, and force working people to sacrifice an unacceptable amount of their income to pay for basic transpiration. It is time to end car dependence and rethink our streets around public transit, walking and bikes.
Their demands include unredacted data from self-driving car companies about safety incidents (and a better reporting system) — plus a mechanism for actually citing robotaxis for traffic violations. But they also raise concerns about surveillance, noting the possibility of "a city-wide, moving network observing and analyzing everything."

Their web page says they also want to see studies on the pollution impact of self-driving cars — and whether or not AVs will increase car usage. They support the concerns of San Francisco's Taxi Workers Alliance about the possibility of lost jobs and increased traffic congestion.

And they raise one more concern: Their cars are not wheelchair accessible and do not pull up to the curb. Profit-driven robotaxi companies see accessibility as an afterthought. Without enforcement, their promises for the future will likely never materialize. Paratransit and transit are accountable to the public, but Cruise and Waymo are only accountable to shareholders.
But their list of concerns is followed by an exhaustive list of 266 robotaxi incidents documented with links to news articles and social media reports. ("The cars have run red lights, rear-ended a bus and blocked crosswalks and bike paths," writes NPR. "In one incident, dozens of confused cars congregated in a residential cul-de-sac, clogging the street. In another, a Waymo ran over and killed a dog.")

NPR's article adds one final note. "Neither Cruise nor Waymo responded to questions about why the cars can be disabled by traffic cones."

Thanks to Slashdot reader Tony Isaac for sharing the news.

The New York Times explores harrowing stories about recent airplane near-miss "close calls" on U.S. runways: The incidents — highlighted in preliminary F.A.A. safety reports but not publicly disclosed — were among a flurry of at least 46 close calls involving commercial airlines last month alone... While there have been no major U.S. plane crashes in more than a decade, potentially dangerous incidents are occurring far more frequently than almost anyone realizes — a sign of what many insiders describe as a safety net under mounting stress. So far this year, close calls involving commercial airlines have been happening, on average, multiple times a week, according to a Times analysis of internal F.A.A. records, as well as thousands of pages of federal safety reports and interviews with more than 50 current and former pilots, air traffic controllers and federal officials.

The incidents often occur at or near airports and are the result of human error, the agency's internal records show... The close calls have involved all major U.S. airlines and have happened nationwide... In addition to the F.A.A. records, The Times analyzed a database maintained by NASA that contains confidential safety reports filed by pilots, air traffic controllers and others in aviation. The analysis identified a similar phenomenon: In the most recent 12-month period for which data was available, there were about 300 accounts of near collisions involving commercial airlines... One problem is that despite repeated recommendations from safety authorities, the vast majority of U.S. airports have not installed warning systems to help prevent collisions on runways.

But the most acute challenge, The Times found, is that the nation's air traffic control facilities are chronically understaffed. While the lack of controllers is no secret — the Biden administration is seeking funding to hire and train more — the shortages are more severe and are leading to more dangerous situations than previously known. As of May, only three of the 313 air traffic facilities nationwide had enough controllers to meet targets set by the F.A.A. and the union representing controllers, The Times found. Many controllers are required to work six-day weeks and a schedule so fatiguing that multiple federal agencies have warned that it can impede controllers' abilities to do their jobs properly.

Slashdot reader Bruce66423 shared this report from the Independent: South Yorkshire Police (SYP) has apologised after revealing more than three years' worth of officer body cam footage has been deleted from its computer systems. SYP said it had referred itself to the Information Commissioner's Office (ICO) after the footage, recorded between July 2020 and May 2023, was found to be missing. The force initially said the incident had been caused by a "significant and unexplained reduction" in stored data on its computer systems and later clarified that the data had been "deleted" and not hacked.

Around 69 cases have been identified as potentially affected by the loss of data and the force said it was working closely with the victims and Crown Prosecution Service. The cases range from cannabis possession through to domestic abuse and sexual offences, SYP told The Independent... Urgent work, led by digital forensic experts, is underway to recover the footage, it added...

It comes just weeks after a major data beach in Northern Ireland, where the force mistakenly published the personal details of officers in response to a freedom of information request. Norfolk and Suffolk police forces, in another freedom of information request incident, released the personal details of more than 1,000 people, including crime victims.

Long-time Slashdot reader SonicSpike shares a new perspective on sunspots (those dark, cool areas where the sun's magnetic field is particularly strong, and which often launch solar flares).

"NASA's Perseverance Mars rover has given us a sneak peek of an intriguing patch of the sun that's not yet visible from Earth," reports Space.com: Perseverance photographs the sun daily with its Mastcam-Z camera system to gauge the amount of dust in the Martian atmosphere. Such an effort captured a big sunspot moving across the solar disk late last week and over the weekend, as SpaceWeather.com reported. "Because Mars is orbiting over the far side of the sun, Perseverance can see approaching sunspots more than a week before we do," SpaceWeather.com wrote in a post highlighting the sunspot photos. "Consider this your one-week warning: A big sunspot is coming...."

Solar flares and coronal mass ejections that hit Earth can affect satellite navigation and disrupt power grids, among other things, so tracking the movement of sunspots is more than just of academic interest.

Long-time Slashdot reader theodp writes: During the U.S. presidential campaign of 1928, a circular published by the Republican Party claimed that if Herbert Hoover won there would be "a chicken in every pot". Times change. When talk turned to education at Wednesday night's 2024 Republican U.S. Presidential Candidate Debate, candidate Asa Hutchinson promised there will be 'CS in every school' if he wins (YouTube).

"Look at Arkansas," the former Arkansas Governor explained. "We have to compete with China. I built computer science education. We led the nation in Computer Science education, going from 1,100 students to 23,000 students taking it. This is how you compete with China. As President of the United States, I will make sure we go from 51% of our schools offering computer science to every school in rural areas and urban areas offering computer science for the benefit of our kids and we can compete with China in terms of technology."

In his last year in office, Hutchinson served as Chair of the National Governors Association (NGA) and rallied the nation's Governors around tech CEOs' demands for more K-12 CS education to culminate his year-long CS evangelism initiative, which the NGA noted enjoyed the support of Amazon, Google, and Microsoft. Hutchinson's pitch to the Governors included a video challenging them with a question. "Will it be American students who learn to code," Hutchinson asked, "or will industry be required to go overseas to find the talent that we need here in the United States of America?"
Later in the debate former New Jersey governor Chris Christie said entrepreneur/candidate Vivek Ramaswamy "sounds like ChatGPT."

"The green energy revolution still faces a huge obstacle: a lack of long-term, cost-efficient renewable storage," writes the Washington Post.

But then they check in on a Finnish start-up running the world's first commercial-scale sand battery, which uses solar panels and wind turbines to heat sand-filled vats (up to 1,000 degrees) to back up district heating networks: The sand can hold onto the power for weeks or months at a time — a clear advantage over the lithium ion battery, the giant of today's battery market, which usually can hold energy for only a number of hours.

Unlike fossil fuels, which can be easily transported and stored, solar and wind supplies fluctuate. Most of the renewable power that isn't used immediately is lost. The solution is storage innovation, many industry experts agree. In addition to their limited capacity, lithium ion batteries, which are used to power everything from mobile phones to laptops to electric vehicles, tend to fade with every recharge and are highly flammable, resulting in a growing number of deadly fires across the world. The extraction of cobalt, the lucrative raw material used in lithium ion batteries, also relies on child labor. U.N. agencies have estimated that 40,000 boys and girls work in the industry, with few safety measures and paltry compensation. These serious environmental and human rights challenges pose a problem for the electric vehicle industry, which requires a huge supply of critical minerals.

So investors are now pouring money into even bigger battery ventures. More than $900 million has been invested in clean storage technologies since 2021, up from $360 million the year before, according to the Long Duration Energy Storage Council, an organization launched after that year's U.N. climate conference to oversee the world's decarbonization. The group predicts that by 2040, large-scale, renewable energy storage investments could reach $3 trillion. That includes efforts to turn natural materials into batteries. Once-obscure start-ups, experimenting with once-humble commodities, are suddenly receiving millions in government and private funding. There's the multi-megawatt CO2 battery in Sardinia, a rock-based storage system in Tuscany, and a Swiss company that's moving massive bricks along a 230-foot tall building to store and generate renewable energy. One Danish battery start-up, which stores energy from molten salt, is sketching out plans to deploy power plants in decommissioned coal mines across three continents...

But in order to succeed, natural batteries will need to provide the same kind of steady power as fossil fuels, at scale. Whether that can be achieved remains to be seen, say energy experts. And the industry may be subject to the same pitfalls that loom over the renewables energy sector at large: Projects will need to be constructed from scratch, and they might only be adopted in developed countries that can afford such experimentation. Lovschall-Jensen, the CEO of a Danish molten salt-based storage start-up called Hyme, says the challenge will be maintaining the same standards to which the modern world has become accustomed: receiving power, on demand, with the flip of a switch.

He believes that natural batteries, though still in their infancy, can serve that goal.

Tuesday Mark Zuckerberg shared a photo on Instagram with "actual footage of me building Threads for web." And now ZDNet reports that Zuckerberg's photo is available on his new Threads page on the web.

"As of Thursday, Meta's new platform is fully accessible to all users from any computer and desktop browser, Instagram head Adam Mosseri confirmed in a new Threads post."

"Use your Instagram account to log in: threads.net," explains the official Threads account. "Scroll to catch up on the conversation, or start a new thread of your own." Posts can include photos and videos, or you can reply and repost to other posts. "This is just the beginning. We're working on bringing everything you know and love from mobile over to web. More soon."

Wired argues the move makes Threads "more broadly usable." Most users will still access it through mobile, if the way people currently access the internet is any indication. But the move to the web is the next step in Meta creating an application just sticky enough to kneecap X and draw attention away from Bluesky, Mastodon, Spoutible, Post, and any other newish social app.

It's also a way to juice its users again. After that spectacular initial sign-up period in July, Threads usage dropped off precipitously. New data from market intelligence firm Sensor Tower suggests that daily active users are down more than 60 percent from its first-week average, though it's now back on the upswing. Threads amassed 44 million daily active users during its launch peak, then saw usage drop to a low of 7 million DAUs in late July. As of mid-August, the app has seen increases of 11 million DAUs, Sensor Tower analysts say. However, time spent on the app per daily active user has also fallen, the firm says.
Caling Threads "a work in progress," Wired notes it ""will supposedly be compatible with ActivityPub, an open social networking protocol, but that hasn't happened yet. The app also doesn't currently support direct messages, a popular feature on X. And Threads is not available in the European Union, due to the regulatory climate there."

Their article also shares an idea from data journalist and engineer Surya Mattu: that both devices and social media apps like Threads should implement a transparency-guaranteeing "inspectability API" to always allow users to inspect their data and activity in real-time.

An anonymous reader quotes a report from 404 Media: A buzzy startup offering financial infrastructure to crypto companies has found itself bankrupt primarily because it can't gain access to a physical crypto wallet with $38.9 million in it. The company also did not write down recovery phrases, locking itself out of the wallet forever in something it has called "The Wallet Event" to a bankruptcy judge. Prime Trust pitches itself as a crypto fintech company designed to help other startups offer crypto retirement plans, know-your-customer interfaces, ensure liquidity, and a host of other services. It says it can help companies build crypto exchanges, payment platforms, and create stablecoins for its clients. The company has not had a good few months. In June, the state of Nevada filed to seize control of the company because it was near insolvency. It was then ordered to cease all operations by a federal judge because it allegedly used customers' money to cover withdrawal requests from other companies.

The company filed for bankruptcy, and, according to a filing by its interim CEO, which you really should read in full, the company offers an "all-in-one solution for customers that remains unmatched in the marketplace." A large problem, among more run-of-the-mill crypto economy problems such as "lack of operational and spending oversight" and "regulatory issues," is the fact that it lost access to a physical wallet it was keeping a tens of millions of dollars in, and cannot get back into it. [...] For several years, the company then took customer deposits into this address, to the tune of tens of millions of dollars. In December, 2021, "when a customer requested a significant withdrawal of ETH that the company could not fulfill [from other wallets,]" it went to withdraw it from this hardware wallet. "It was around this time that they discovered that the Company did not have the Wallet Access Devices and thus, could not access the cryptocurrency stored in the 98f Wallet."

The company then, for several months, had to "use $76,367,247.90 in the aggregate to purchase ETH to fund customer withdrawals." The money stuck in the wallet is currently worth $38.9 million as of August 22, it claimed. It is worth mentioning that the company did not tell regulators or customers about this issue for months after it discovered the problem. The company has still not solved this issue: "The Company remains unable to access the 98f Wallet," it wrote. "The investigation continues." Prime Trust swears in its filing that this was an "aberrant" event and "extremely unlikely to occur again."

A European study reveals that around 90% of eco-friendly paper straws contain "forever chemicals" called PFAS, which do not easily break down and can accumulate in the body, potentially causing health issues. New Atlas reports: "Forever chemicals" is the colloquial name given to a class of more than 12,000 chemicals, more formally known as poly- and perfluoroalkyl substances (PFAS), that barely break down in the environment or in our bodies. Hence, the "forever" part. [...] The researchers tested 39 different brands of straws made from paper, glass, bamboo, stainless steel, and plastic, and analyzed them for 29 different PFAS compounds. The majority of brands tested (69%) contained PFAS, with 18 different PFAS detected in total. Paper straws were most likely to contain PFAS, with the chemicals detected in 90% of the brands tested, albeit in highly variable concentrations. Perfluorooctanoic acid (PFOA), a compound linked to high cholesterol, a reduced immune response, thyroid disease and increased kidney and testicular cancer, was most frequently detected. PFOA has been banned globally since 2020. Also detected were trifluoroacetic acid (TFA) and trifluoromethanesulfonic acid (TFMS), ultra-short-chain PFAS that are highly water-soluble and so might leach out of straws into drinks.

Bamboo straws fared only slightly better than paper ones, with PFAS found in 80% of brands tested. The chemicals were found in 75% of plastic straws and 40% of glass brands. PFAS were not detected in any of the steel straws tested. The PFAS concentrations were low and, the researchers say, pose a small risk to human health. However, the problem with PFAS is that they're bioaccumulative, meaning they can build up over time because they're absorbed but not excreted. The researchers say that while the study did not determine whether PFAS were added to the straws or were the result of contamination -- for example, from the soil in which the plant-based materials are grown -- the presence of the chemicals in almost every brand of paper straw means it's likely that, in some cases, PFAS were used as a water-repellent coating. The study also did not examine whether PFAS leached out of the straws into the liquid they were sitting in. To be safe, the researchers suggest people start using stainless steel straws, or ditch straws altogether. The study was published in the journal Food Additives and Contaminants.

SpaceX says it successfully test-fired the booster for its next Starship launch, although that liftoff may still be weeks away. SpaceNews reports: SpaceX fired the Raptor engines in the Super Heavy booster designated Booster 9 in a static-fire test at its Starbase test site in Boca Chica, Texas, at approximately 1:35 p.m. Eastern Aug. 25. SpaceX said it conducted a "full duration" firing, which appeared to last about five to six seconds. SpaceX later stated that all 33 engines successfully ignited, although two shut down prematurely. "Congratulations to the SpaceX team on this exciting milestone!"

The company did not state if that performance was sufficient for it to proceed with a launch attempt, but it was better than an earlier test of the same booster Aug. 6. That test ended early, after the engines fired for less than three seconds, with four of the Raptors shutting down prematurely. If SpaceX is satisfied with the outcome of the test, it is likely one of the final technical milestones before it is ready for a second integrated Starship/Super Heavy launch. The first, April 20, failed four minutes after liftoff when several Raptor engines in the Super Heavy booster shut down and vehicle later lost control and tumbled.

An anonymous reader quotes a report from The Conversation: The Y chromosome is a never-ending source of fascination (particularly to men) because it bears genes that determine maleness and make sperm. It's also small and seriously weird; it carries few genes and is full of junk DNA that makes it horrendous to sequence. However, new "long-read" sequencing techniques have finally provided a reliable sequence from one end of the Y to the other. The paper describing this Herculean effort has been published in Nature. The findings provide a solid base to explore how genes for sex and sperm work, how the Y chromosome evolved, and whether -- as predicted -- it will disappear in a few million years. [...]

Spoiler alert -- the Y turns out to be just as weird as we expected from decades of gene mapping and the previous sequencing. A few new genes have been discovered, but these are extra copies of genes that were already known to exist in multiple copies. The border of the pseudoautosomal region (which is shared with the X) has been pushed a bit further toward the tip of the Y chromosome. We now know the structure of the centromere (a region of the chromosome that pulls copies apart when the cell divides), and have a complete readout of the complex mixture of repetitive sequences in the fluorescent end of the Y.

But perhaps the most important outcome is how useful the findings will be for scientists all over the world. Some groups will now examine the details of Y genes. They will look for sequences that might control how SRY and the sperm genes are expressed, and to see whether genes that have X partners have retained the same functions or evolved new ones. Others will closely examine the repeated sequences to determine where and how they originated, and why they were amplified. Many groups will also analyze the Y chromosomes of men from different corners of the world to detect signs of degeneration, or recent evolution of function. It's a new era for the poor old Y.