Robert Habeck, Germany’s vice chancellor and economy minister, said Europe’s “unhindered access to space is strategically crucial.”

“With the first launch of Isar Aerospace’s Spectrum rocket, Germany has impressively demonstrated that it is an important location for the development of innovative space technologies,” Habeck wrote on LinkedIn. “The first flight provided important data and experience for the rocket’s next flight… Isar Aerospace can and will make a decisive contribution to securing Europe’s independent access to space!”

The Spectrum rocket is the largest launch vehicle primarily built in Germany, supplanting the V-2 missile from World War II.

In the last few months, European government officials have emphasized their desire to break free of relying on other countries for defense and space technology. Europe was a longtime customer for Russia’s Soyuz rocket, but the partnership ended in 2022 with Russia’s invasion of Ukraine. Delays in the debut of the Ariane 6 rocket and failures with the smaller Vega rocket forced European governments to sign contracts with SpaceX to launch several scientific and security-related satellites.

Metzler, Isar’s chief executive, was asked last year what he would consider a successful inaugural flight of Spectrum.

“For me, the first flight will be a success if we don’t blow up the launch site,” he said at the Handelsblatt innovation conference. “That would probably be the thing that would set us back the most in terms of technology and time.”

This tempering of expectations sounds remarkably similar to statements made by Elon Musk about SpaceX’s first flight of the Starship rocket in 2023.

By this measure, Isar officials can be content with Sunday’s result. The company is modeling its test strategy on SpaceX’s iterative development cycle, where engineers test early, make fixes, and fly again. This is in stark contrast to the way Europe has traditionally developed rockets. The alternative to Isar’s approach could be to “spend 15 years researching, doing simulations, and then getting it right the first time,” Metzler said.

With the first launch of Spectrum, Isar has tested the rocket. Now, it’s time to make fixes and fly again. That, Isar’s leaders argue, will be the real measure of success.

“We’re super happy,” Metzler said in a press call after Sunday’s flight. “It’s a time for people to be proud of, and for Europe, frankly, also to be proud of.”

https://arstechnica.com/space/2025/03/europes-first-private-launch-company-is-learning-to-embrace-failure/

A prominent computer scientist who has spent 20 years publishing academic papers on cryptography, privacy, and cybersecurity has gone incommunicado, had his professor profile, email account, and phone number removed by his employer, Indiana University, and had his homes raided by the FBI. No one knows why.

Xiaofeng Wang has a long list of prestigious titles. He was the associate dean for research at Indiana University’s Luddy School of Informatics, Computing and Engineering, a fellow at the Institute of Electrical and Electronics Engineers and the American Association for the Advancement of Science, and a tenured professor at Indiana University at Bloomington. According to his employer, he has served as principal investigator on research projects totaling nearly $23 million over his 21 years there.

He has also co-authored scores of academic papers on a diverse range of research fields, including cryptography, systems security, and data privacy, including the protection of human genomic data. I have personally spoken to him on three occasions for articles here, here, and here.

“None of this is in any way normal”

In recent weeks, Wang’s email account, phone number, and profile page at the Luddy School were quietly erased by his employer. Over the same time, Indiana University also removed a profile for his wife, Nianli Ma, who was listed as a Lead Systems Analyst and Programmer at the university’s Library Technologies division.

As reported by the Bloomingtonian and later the Herald-Times in Bloomington, a small fleet of unmarked cars driven by government agents descended on the Bloomington home of Wang and Ma on Friday. They spent most of the day going in and out of the house and occasionally transferred boxes from their vehicles. TV station WTHR, meanwhile, reported that a second home owned by Wang and Ma and located in Carmel, Indiana, was also searched. The station said that both a resident and an attorney for the resident were on scene during at least part of the search.

https://arstechnica.com/security/2025/03/computer-scientist-goes-silent-after-fbi-raid-and-purging-from-university-website/

NASA’s Curiosity Mars rover has detected the largest organic (carbon-containing) molecules ever found on the red planet. The discovery is one of the most significant findings in the search for evidence of past life on Mars. This is because, on Earth at least, relatively complex, long-chain carbon molecules are involved in biology. These molecules could actually be fragments of fatty acids, which are found in, for example, the membranes surrounding biological cells.

Scientists think that, if life ever emerged on Mars, it was probably microbial in nature. Because microbes are so small, it’s difficult to be definitive about any potential evidence for life found on Mars. Such evidence needs more powerful scientific instruments that are too large to be put on a rover.

The organic molecules found by Curiosity consist of carbon atoms linked in long chains, with other elements bonded to them, like hydrogen and oxygen. They come from a 3.7-billion-year-old rock dubbed Cumberland, encountered by the rover at a presumed dried-up lakebed in Mars’s Gale Crater. Scientists used the Sample Analysis at Mars (SAM) instrument on the NASA rover to make their discovery.

Scientists were actually looking for evidence of amino acids, which are the building blocks of proteins and therefore key components of life as we know it. But this unexpected finding is almost as exciting. The research is published in Proceedings of the National Academies of Science.

Among the molecules were decane, which has 10 carbon atoms and 22 hydrogen atoms, and dodecane, with 12 carbons and 26 hydrogen atoms. These are known as alkanes, which fall under the umbrella of the chemical compounds known as hydrocarbons.

It’s an exciting time in the search for life on Mars. In March this year, scientists presented evidence of features in a different rock sampled elsewhere on Mars by the Perseverance rover. These features, dubbed “leopard spots” and “poppy seeds,” could have been produced by the action of microbial life in the distant past, or not. The findings were presented at a US conference and have not yet been published in a peer-reviewed journal.

https://arstechnica.com/science/2025/03/nasas-curiosity-rover-has-found-the-longest-chain-carbon-molecules-yet-on-mars/

Importantly, it then applies a weighting step, dividing higher-frequency spectral coefficients by the overall brightness (the DC component), allowing less important data to be compressed more aggressively. That is then fed into the codec, and rather than inventing a completely new file type, the method uses the compression engine and features of the standardized JPEG XL image format to store the specially prepared spectral data.

Making spectral images easier to work with

According to the researchers, the massive file sizes of spectral images have reportedly been a real barrier to adoption in industries that would benefit from their accuracy. Smaller files mean faster transfer times, reduced storage costs, and the ability to work with these images more interactively without specialized hardware.

The results reported by the researchers seem impressive—with their technique, spectral image files shrink by 10 to 60 times compared to standard OpenEXR lossless compression, bringing them down to sizes comparable to regular high-quality photos. They also preserve key OpenEXR features like metadata and high dynamic range support.

While some information is sacrificed in the compression process—making this a “lossy” format—the researchers designed it to discard the least noticeable details first, focusing compression artifacts in the less important high-frequency spectral details to preserve important visual information.

Of course, there are some limitations. Translating these research results into widespread practical use hinges on the continued development and refinement of the software tools that handle JPEG XL encoding and decoding. Like many cutting-edge formats, the initial software implementations may need further development to fully unlock every feature. It’s a work in progress.

And while Spectral JPEG XL dramatically reduces file sizes, its lossy approach may pose drawbacks for some scientific applications. Some researchers working with spectral data might readily accept the trade-off for the practical benefits of smaller files and faster processing. Others handling particularly sensitive measurements might need to seek alternative methods of storage.

For now, the new technique remains primarily of interest to specialized fields like scientific visualization and high-end rendering. However, as industries from automotive design to medical imaging continue generating larger spectral datasets, compression techniques like this could help make those massive files more practical to work with.

https://arstechnica.com/science/2025/03/scientists-are-storing-light-we-cannot-see-in-formats-meant-for-human-eyes/

Since Trump took office on January 20, research funding from the National Institutes of Health has plummeted by more than $3 billion compared with the pace of funding in 2024, according to an analysis by The Washington Post.

By this time in March 2024, the NIH had awarded US researchers a total of $1.027 billion for new grants or competitive grant renewals. This year, the figure currently stands at about $400 million. Likewise, funding for renewals of existing grants without competition reached $4.5 billion by this time last year, but has only hit $2 billion this year. Together, this slowdown amounts to a 60 percent drop in grant support for a wide variety of research—from studies on cancer treatments, diabetes, Alzheimer’s, vaccines, mental health, transgender health, and more.

The NIH is the primary source of funding for biomedical research in the US. NIH grants support more than 300,000 scientists at more than 2,500 universities, medical schools, and other research organizations across all 50 states.

In the near term, the missing grant money means clinical trials have been abruptly halted, scientific projects are being shelved, supplies can’t be purchased, and experiments can’t be run. But, in the long run, it means a delay in scientific advancements and treatment, which could echo across future generations. With funding in question, academic researchers may be unable to retain staff or train younger scientists.

https://arstechnica.com/health/2025/03/report-us-scientists-lost-3-billion-in-nih-grants-since-trump-took-office/

On Thursday, the Trump administration issued an executive order that took aim at one of the US’s foremost cultural and scientific institutions: the Smithsonian. Upset by exhibits that reference the role of racism, sexism, and more in the nation’s complicated past, the order tasks the vice president and a former insurance lawyer (?) with ensuring that the Smithsonian Institution is a “symbol of inspiration and American greatness”—a command that specifically includes the National Zoo.

But in the process of airing the administration’s grievances, the document specifically calls out a Smithsonian display for accurately describing our current scientific understanding of race. That raises the prospect that the vice president will ultimately demand that the Smithsonian display scientifically inaccurate information.

Grievance vs. science

The executive order, entitled “Restoring Truth And Sanity To American History,” is filled with what has become a standard grievance: the accusation that, by recognizing the many cases where the US has not lived up to its founding ideals, institutions are attempting to “rewrite our nation’s history.” It specifically calls out discussions of historic racism, sexism, and oppression as undercutting the US’s “unparalleled legacy of advancing liberty, individual rights, and human happiness.”

Even if you move past the obvious tension between a legacy of advancing liberty and the perpetuation of slavery in the US’s founding documents, there are other ironies here. For example, the order slams the Department of the Interior’s role in implementing changes that “inappropriately minimize the value of certain historical events or figures” at the same time that the administration’s policies have led to the removal of references to transgender individuals and minorities and women.

https://arstechnica.com/science/2025/03/trump-annoyed-the-smithsonian-isnt-promoting-discredited-racial-ideas/

Welcome to Edition 7.37 of the Rocket Report! It’s been interesting to watch how quickly European officials have embraced ensuring they have a space launch capability independent of other countries. A few years ago, European government satellites regularly launched on Russian Soyuz rockets, and more recently on SpaceX Falcon 9 rockets from the United States. Russia is now non grata in European government circles, and the Trump administration is widening the trans-Atlantic rift. European leaders have cited the Trump administration and its close association with Elon Musk, CEO of SpaceX, as prime reasons to support sovereign access to space, a capability currently offered only by Arianespace. If European nations can reform how they treat their commercial space companies, there’s enough ambition, know-how, and money in Europe to foster a competitive launch industry.

As always, we welcome reader submissions. 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.

Isar Aerospace aims for weekend launch. A German startup named Isar Aerospace will try to launch its first rocket Saturday, aiming to become the first in a wave of new European launch companies to reach orbit, Ars reports. The Spectrum rocket consists of two stages, stands about 92 feet (28 meters) tall, and can haul payloads up to 1 metric ton (2,200 pounds) into low-Earth orbit. Based in Munich, Isar was founded by three university graduate students in 2018. Isar scrubbed a launch attempt Monday due to unfavorable winds at the launch site in Norway.

From the Arctic … Notably, this will be the first orbital launch attempt from a launch pad in Western Europe. The French-run Guiana Space Center in South America is the primary spaceport for European rockets. Virgin Orbit staged an airborne launch attempt from an airport in the United Kingdom in 2023, and the Plesetsk Cosmodrome is located in European Russia. The launch site for Isar is named Andøya Spaceport, located about 650 miles (1,050 kilometers) north of Oslo, inside the Arctic Circle. (submitted by EllPeaTea)

https://arstechnica.com/space/2025/03/rocket-report-stoke-is-stoked-sovereignty-is-the-buzzword-in-europe/

Then, the researchers got data on all the speeding tickets issued in Florida and identified the ones belonging to Lyft drivers.

The data showed one thing clearly: Lyft has incentives for its drivers to avoid traffic violations, and they work. “Compared with the general population of motorists, our sample is less prone to speed, especially more than 10 mph over the limit,” the team writes. “As a result, our analysis examines only 1,423 citations for speeding.” While lower than you’d expect, that’s more than enough to do some statistics on the frequency of these citations.

Animus

There’s a lot of confounding factors that might influence whether someone gets pulled over and cited, like their gender, the make of their car, and so on. The researchers handle this in two ways. For one analysis, the researchers themselves chose a set of factors to include as potential confounding influences in an analysis. For the second, they relied on machine learning to determine the factors that would be considered in the analysis. Both approaches led to similar results.

The results clearly reproduced a similar pattern to earlier research. Minority Lyft drivers were about 30 percent more likely to be pulled over and cited for speeding (the two analyses produced results of 24 and 33 percent). Once cited, they were also likely to receive higher fines, either 23 or 34 percent more than white drivers.

The remaining question was why—the police could potentially be acting out of bias, or they could be attempting to deter minority drivers because they are more prone to problematic driving. So, the researchers compared the actual frequency of speeding based on the GPS data and used accidents as a proxy for problematic driving habits. Neither of these showed any significant differences between minorities and white drivers.

So, the researchers are left to conclude it’s simply because of what they call “animus” against minority drivers on the part of the police. And the problems go well beyond the impact of the fines themselves. The researchers note that most auto insurance policy providers give drivers discounts for avoiding traffic violations. Which suggests that minorities face the additional burden of paying more simply for being able to drive with insurance, something that’s legally required by US states.

Science, 2025. DOI: 10.1126/science.adp5357  (About DOIs).

https://arstechnica.com/science/2025/03/study-of-lyft-rideshare-data-confirms-minorities-get-more-tickets/

The team found that, when set up to operate on the verge of punch-through mode, it was possible to use the gate voltage to control the charge build-up in the silicon, either shutting the device down or enabling the spikes of activity that mimic neurons. Adjustments to this voltage could allow different frequencies of spiking. Those adjustments could be made using spikes as well, essentially allowing spiking activity to adjust the weights of different inputs.

With the basic concept working, the team figured out how to operate the hardware in two modes. In one of them, it acts like an artificial synapse, capable of being set into any of six (and potentially more) weights, meaning the potency of the signals it passes on to the artificial neurons in the next layer of a neural network. These weights are a key feature of neural networks like large language models.

But when combined with a second transistor to help modulate its behavior, it was possible to have the transistor act like a neuron, integrating inputs in a way that influenced the frequency of the spikes it sends on to other artificial neurons. The spiking frequency could range in intensity by as much as a factor of 1,000. And the behavior was stable for over 10 million clock cycles.

All of this simply required standard transistors made with CMOS processes, so this is something that could potentially be put into practice fairly quickly.

Pros and cons

So what advantages does this have? It only requires two transistors, meaning it’s possible to put a lot of these devices on a single chip. “From the synaptic perspective,” the researchers argue, “a single device could, in principle, replace static random access memory (a volatile memory cell comprising at least six transistors) in binarized weight neural networks, or embedded Flash in multilevel synaptic arrays, with the immediate advantage of a significant area and cost reduction per bit.”

https://arstechnica.com/science/2025/03/researchers-get-spiking-neural-behavior-out-of-a-pair-of-transistors/

“$10 billion in the near term, plussing up our current resources, we can spend that,” Saltzman said. “We can jump start that, and then you get into that steady state kind of growth that’s necessary to continue to add the capabilities, continue to close the programs. So that’s what we’re really trying to sell inside the department first because there’s a lot of priorities, a lot of constraints.”

Defense officials are waiting for the Trump administration to release its budget request for fiscal year 2026. For now, the White House is holding the figures close to the vest. Details of the budget proposal should reveal whether the Pentagon, and particularly the Space Force, will prevail in a climate of government downsizing.

For now, the Space Force is under a civilian hiring freeze imposed by the White House. Some military civilians took the Trump administration’s offer of early retirement, and the Space Force doesn’t have a way to replace them.

Last month, Defense Secretary Pete Hegseth directed military leaders to redirect 8 percent of the defense budget from “non-lethal” programs toward Trump’s priorities. Saltzman didn’t identify which programs the Space Force deemed lowest priority, but he said the savings will go into a “war chest” to shift to other missions.

“I’m very hopeful that the case that the Space Force makes means that a lot of that money will come back into our budget, and potentially, with initiatives like Golden Dome, we’ll even get more money and more resources because we play such a central role in that,” Saltzman said.

We’ll find out soon just how gilded Trump wants to make the Golden Dome. Military officials owe the White House a report on possible Golden Dome architectures at the end of this week. Presumably, we’ll see something about initial costs for the Golden Dome in the White House’s fiscal year 2026 budget request to Congress.

There’s a good chance lawmakers will conclude the government can’t afford to add any superfluous bells and whistles to the proposed missile defense shield, if it goes forward at all. Maybe, with due deference to Israel’s system, it makes sense to name something that’s supposed to save millions of lives after a stronger, more affordable metal—like iron.

https://arstechnica.com/space/2025/03/maybe-trump-should-go-back-to-calling-his-missile-shield-the-iron-dome/