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The Pegasus team from the Aris student space initiative has generated a stable detonation wave with its engine. Robin Wyss / Aris Space ========================================================================= Students in Switzerland have recently tested an experimental rocket engine that is capable of generating 20,000 detonation waves per second, the same propulsion concept explored by NASA and Japanese researchers for future space missions. The so-called rotating detonation rocket engine (RDRE) is powered by propane and liquid oxygen. It was built by the Pegasus team, a student project within the ARIS (Academic Space Initiative Switzerland) at ETH Zurich. The third-year students spent nearly a year developing...

Credit: CTIO/NOIRLab/DOE/NSF/AURA/J. Pollard Image Processing: D. de Martin & M. Zamani (NSF NOIRLab) =============================================================================== In A Nutshell A 37-member international team produced the most precise direct measurement of the Hubble constant ever recorded, with just 1.1 percent uncertainty. By linking a dozen different cosmic distance measurement methods into a single “Distance Network,” they confirmed the universe is currently expanding at about 73.5 kilometers per second per 3.26 million light-years. That rate conflicts with what the Big Bang’s ancient afterglow predicts by more than seven times the margin of error, a gap that makes a simple measurement mistake increasingly implausible. Resolving...

A mutant super pig population has spiraled out of control — thanks to their inherited, rapid reproductive cycles — in the ghost towns of a nuclear fallout zone in Japan, according to reports and researchers. The 2011 Fukushima Daiichi Nuclear Power Plant disaster, spurred by a massive 9.0-magnitude earthquake and tsunami, forced roughly 164,000 people to flee from their homes to escape the radiation zone. Amid the chaos, domestic pigs escaped into abandoned farmland and began interbreeding with indigenous feral boars — creating a mutant pig population with alarming genes, Popular Science reported. Researchers from Fukushima and Hirosaki Universities discovered...

Explanation: This big beautiful spiral shines in X-ray light. It is about 20 times larger than our Galaxy. It belongs to Abell 2029, a galaxy cluster one billion light-years away. (To see only the galaxies, hover your cursor over the image, or follow this link.) Galaxy clusters are the largest structures in the universe that are supported by gravity. Abell 2029 is formed by thousands of galaxies, surrounded by a huge cloud of hot gas and the equivalent of hundreds of trillions times the mass of the Sun in dark matter. The spiral is made of gas, mostly hydrogen and...

At 0.016 seconds after the atomic detonation, the fireball was already hundreds of meters wide. The tiny squares to the left and right in this image are billboards 200 meters from the center of the explosion. Los Alamos National Laboratory.Editor’s note: If you’d like to pinpoint the instant when the world entered the nuclear age, 5:29:45 a.m. Mountain War Time on 16 July 1945, is an excellent choice. That was the moment when human beings first unleashed the power of the nucleus in an immense, blinding ball of fire above a gloomy stretch of desert in the Jornada del Muerto...

A UN body of researchers that puts together possible climate scenarios announced last week that one extreme scenario it put forward back in 2011 is no longer plausible. As Roger Pielke Jr. from AEI puts it, the climate apocalypse is no longer around the corner.The climate apocalypse isn’t around the corner after all. That’s the upshot of a recent report from the international panel that supplies official “scenarios” to researchers, governments and banks. It turns out that the most extreme assumptions about the future — the doomsaying predictions embodied in the worst-case scenario known as RCP8.5 — are “implausible.”...The substance...

Explanation: A dark wolf lies in gum. No, this isn’t a riddle! Today's image features the Dark Wolf Nebula (Sandqvist–Lindroos 17), a spooky dust cloud embedded within the Gum 55 (RCW 113) Nebula in the Scorpius constellation. While dust is a pest to us, it serves a vital role in creating the necessary conditions for stars to be born. The Dark Wolf absorbs the intense ultraviolet and visible light emitted by young stars in Gum 55 and re-emits it at longer, mainly infrared, wavelengths. This prevents the higher energy light from heating up the gas in the region. When a...

We Could, We Should, We MustOn Insects As a Delivery System, and “Beneficial Bloodsucking.”A few summers ago I gave consideration to moving to Florida or Texas. This was 2021 when it felt like there was a collective madness in my hometown of New York City. If you remember that moment, you remember the destinations where people like me were fleeing. I was looking into places like Florida and Texas. The so-called free states, the escape hatches (not my framing but more of a public consciousness in a particular demographic that I had seemed to become a part of). I compiled...

...The discovery was made by Henrik Refsnes Mørtvedt, a first-grade pupil at Fredheim School, during a class trip in the Brandbu area of the Gran municipality, in Norway's Innlandet county. According to NRK, Henrik spotted part of the object protruding from the soil while walking across a field with his classmates...Instead of treating it as a souvenir, they contacted local archaeologists. That decision may have saved an important piece of Norway's early medieval past.Archaeologists identified the object as a single-edged sword, meaning it was sharpened on only one side. This type of blade is often associated with the Merovingian Period...

Explanation: Is this a painting or a photograph? In this celestial abstract art composed with a cosmic brush, dusty nebula NGC 2170, also known as the Angel Nebula, shines just above the image center. Reflecting the light of nearby hot stars, NGC 2170 is joined by other bluish reflection nebulae, a red emission region, many dark absorption nebulae, and a backdrop of colorful stars. Like the common household items that abstract painters often choose for their subjects, the clouds of gas, dust, and hot stars featured here are also commonly found in a setting like this one -- a massive,...

Could this bring species back from egg-stinction? Texas firm Colossal Biosciences, which has dedicated itself to resurrecting lost species, including the dire wolf and woolly mammoth, has hatched live chicks from an artificial egg for the first time — a crucial, “Jurassic Park”-esque step in its mission to bring back the moa and other giant, long-gone avians. The first-of-its-kind artificial egg allows a bird embryo to develop completely outside of a biological shell while scientists oversee every aspect from early embryo to hatching. The team hatched 26 “healthy” chickens, which “will live out their natural lives” at the company’s avian...

A Democratic congressional candidate in Michigan is being roasted online over a series of unhinged TikTok campaign videos that show her twerking, lip-syncing and posing in front of banners that scream “P—y Power.” Shelby Campbell, a 32-year-old single mom, has flooded her social media with clips of herself dancing, responding to haters and spouting her political views as part of her campaign for Michigan’s 13th Congressional District, which includes parts of Detroit and several suburbs. Some of Campbell’s more outrageous clips have exploded online in recent days, racking up millions of views as critics claimed that she’s proof that “Democrats...

Apocalyptic climate-change predictions were box-office gold for Hollywood but they did untold damage to the public psyche, economy and the average man’s pocketbook. Now the United Nations’ influential climate change committee has quietly discarded the dire temperature-rise scenarios used in two previous reports predicting horrific consequences of global warming if greenhouse emissions weren’t curbed. For years, lefty outfits — based on dubious climate science — screamed about the coming climate catastrophe: The New York Times warned that “Climate Change Is Harming The Planet Faster Than We Can Adapt,” “Climate Change Is Speeding Toward Catastrophe” and “A Hotter Future Is Certain.”...

For more than two centuries, scientists have tried to determine one of the most important numbers in physics: the universal gravitational constant, known as "big G." It defines the strength of gravity throughout the universe, influencing everything from falling objects on Earth to the motion of galaxies. Yet despite its importance, researchers still cannot agree on its exact value. That uncertainty weighed heavily on Stephan Schlamminger, a physicist at the National Institute of Standards and Technology (NIST), as he prepared to open a sealed envelope containing a crucial secret number. For nearly 10 years, Schlamminger had devoted much of his...

Speaking virtually Monday at the Samson International Smart Mobility Summit in Tel Aviv, Musk said Neuralink’s work restoring speech, movement, and eventually vision amounts to “Jesus-level technologies.” The comments arrived alongside fresh timelines for Neuralink’s expansion, including a new prediction that the company could implant its vision-restoration device, Blindsight, into a human patient before the end of this year.For investors, this was more than another headline-grabbing Musk appearance. It was a reminder that one of the world’s richest men is trying to build an entirely new medical and computing industry at the same time the AI boom is reshaping capital...

Explanation: Spiral galaxy NGC 3169 looks to be unraveling like a ball of cosmic yarn. It lies some 70 million light-years away, south of bright star Regulus toward the faint constellation Sextans. Wound up spiral arms are pulled out into sweeping tidal tails as NGC 3169 (left) and neighboring NGC 3166 interact gravitationally. Eventually the galaxies will merge into one, a common fate even for bright galaxies in the local universe. Drawn out stellar arcs and plumes are clear indications of the ongoing gravitational interactions across the deep and colorful galaxy group photo. The telescopic frame spans about 20 arc...

With current events stirring up global energy prices, corn ethanol is again being dressed up as if it is a domestic energy source and agent of energy security. The truth is that corn ethanol is an energy sump, and that it takes more fossil fuel energy to make a gallon of corn ethanol than a gallon of gasoline. It is time to face this unpleasant truth and the other perverse outcomes achieved by twenty years of misguided policy. In 2005 and 2007, Congress passed the Energy Policy and Energy Independence and Security Acts that together created the Renewable Fuel Standard...

According to a statement released by the Israel Antiquities Authority (IAA), archaeologists unearthed a mysterious tunnel beneath the streets of Jerusalem. During construction work near Kibbutz Ramat Rachel, workers unexpectedly discovered the entrance to an ancient cavity, measuring 16 feet high and 10 feet wide, that was once accessed via a rock-cut staircase. At first researchers believed the passageway may have been part of an ancient water installation built to access underground springs, but this was subsequently ruled out, since the walls of the tunnel were not covered in plaster as they typically would have been. Geologists also found no...

Teenagers are known for dishing out the dirt, but not quite like this. Students at a high school in Maine were fed potting soil at a community service event raising money to fight hunger, in a bizarre incident the school called “an unfortunate accident.” Students at Medomack Valley High School in Waldoboro had baked a batch of potting soil earlier that day during a science class experiment to determine the effect of sterilized soil on plant growth, according to a statement from the school. “The soil had been placed in a baking dish covered with foil and set off to...

Explanation: Across the center of this spiral galaxy is a bar. And at the center of this bar is smaller spiral. And at the center of that spiral is a supermassive black hole. This all happens in the big, beautiful, barred spiral galaxy cataloged as NGC 1300, a galaxy that lies some 70 million light-years away toward the constellation of the river Eridanus. This Hubble Space Telescope composite view of the gorgeous island universe is one of the most detailed Hubble images ever made of a complete galaxy. NGC 1300 spans over 100,000 light-years and the Hubble image reveals striking...