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Chemists have found a new way to determine 3D genome structures, using generative AI, that can predict thousands of genome structures in minutes, making it much speedier than existing methods for analyzing the structures.

Researchers compared the environmental impacts of lithium-ion battery recycling to mining for new materials and found that recycling significantly outperforms mining in terms of greenhouse gas emissions, water use, and energy use.

A new study of satellite imagery and high-resolution climate model data upends previous assumptions and provides insight about how the atmosphere and ocean weather patterns interact. The new research reveals the surprising ways atmospheric winds influence ocean eddies, shaping the ocean's weather patterns in more complex ways than previously believed.

The Hakuto-R 2 mission launched on January 15, 2025. It’s the successor to Hakuto-R, which launched in December 2022 but failed when it lost communications during its descent. Both missions carried rovers, and this image was captured by the rover Resilience as it travels toward the Moon.

The company behind Hakuto-R 1 and 2 is ispace. ispace develops robotics and other technologies that they intend to use to compete for commercial contracts. These missions are technology demonstration missions. Hakuto-R 1 carried the Emirates Lunar Mission, a rover named Rashid. Hakuto-R 2 carries ispace’s own micro-rover named Resilience.

ispace posted this image on social media with the text, “The RESILIENCE lander remains in excellent health as it continues to orbit Earth in its planned trajectory towards the Moon!”

“RESILIENCE knows what it means to be alone in the vastness of space. Looking back at Earth on Jan. 25, 2025, the lander was about 10,000km from our Blue Marble, poignantly capturing Point Nemo, the most remote place on our planet, about 2,688 kilometres from the nearest land.”

The most well-known picture of our Blue Marble came from astronauts on Apollo 17 in 1972. It appeared during a boom in environmental activism and helped people around the world understand the planet they live on and consider its future and our impact on it.

The Blue Marble image of Earth from Apollo 17. Image Credit: NASA

The second most well-known image of Earth is probably Carl Sagan’s Pale Blue Dot image. Voyager 1 captured that image in 1990 on its way to the outer Solar System. The spacecraft captured the image from 6 billion km away when it passed Saturn. Carl Sagan proposed the idea not for scientific reasons but to drive home the idea that humanity’s home was just a tiny dot in the dark.

The “pale blue dot” of Earth captured by Voyager 1 in Feb. 1990 (NASA/JPL)

It seems de rigueur now for space missions to turn around and capture an image of Earth on their way to their destinations.

OSIRIS REx did it.

Black and white image of Earth taken by the OSIRIS-REx’s NavCam 1 instrument. Image Credit: NASA/OSIRIS-REx team and the University of Arizona

So did Artemis 1’s Orion spacecraft.

On Flight Day 9, NASA’s Orion spacecraft captured imagery looking back at the Earth from a camera mounted on one of its solar arrays. Image Credit: NASA

So have Lucy and many others. Now, they’re as common as pictures of their homes that young people take as they leave for college.

Yet, we don’t seem to ever tire of them. For some reason.

Maybe it’s because we’re accustomed to looking at maps with borders and labels on them, emphasizing how we see our planet through a political and historical lens. In those images, the context is human.

But images of Earth from space have none of that. They show the true context of our planet. It’s a brilliant blue sphere, rippling with life, delicate and precious. It’s at the mercy of greater events that go on elsewhere in the Solar System and beyond, events beyond our control.

The people at ispace might not have intended their image to trigger this type of thinking. But regardless, this image takes its place in a long lineage of images of Earth captured by our departing spacecraft.

Hopefully, that lineage will continue for a long time.

The post Japanese Lander Looks Back at Earth as it Heads to the Moon appeared first on Universe Today.

A galactic merger is a chaotic event. When two massive structures like galaxies merge, their powerful gravitational forces wrench stars out of their usual orbits in a process called violent relaxation. In essence, the merging galaxies are evolving rapidly, and small perturbations can be amplified as the system moves toward a more stationary state.

Intuition suggests that this chaos should disrupt the galaxy, including its star formation, but new observations of the Arp 220 galaxy merger show that something else happens: the merger creates a massive magnetic field that traps gas and encourages more stars to form.

Arp 220 is one of the closest galaxy mergers to us. It’s also extremely bright in infrared and is considered to be the prototypical ULIRG—an Ultraluminous Infrared Galaxy. It’s the result of two spiral galaxies merging. The galaxies are gas-rich, which triggers starburst activity in Arp 220’s central regions. In new research, scientists from the Harvard and Smithsonian Center for Astrophysics and other institutions probed these central regions with the Submillimeter Array on Maunakea in Hawaii to better understand the magnetic fields.

The research is “Polarized Dust Emission in Arp220: Magnetic Fields in the Core of an Ultraluminous Infrared Galaxy.” It will be published in the Monthly Notices of the Royal Astronomical Society, and the lead author is David Clements from the Department of Physics at Imperial College in the UK.

ULIRGs are characterized by intense star formation and extreme luminosity in the infrared. “Arp 220 is the merger of two gas-rich spiral galaxies and hosts a massive starburst forming stars at a rate of ~ 100 solar masses per year,” the authors explain. The star formation is concentrated in two distinct nuclei in Arp 220’s center.

Since Arp 220 is the prototypical ULIRG, it’s a natural laboratory and a case study for understanding these objects and their starburst nature. The researchers aimed the Submillimeter Array (SMA) at Arp 220’s central regions to detect polarized light coming from polarized dust there. Since dust grains align themselves with magnetic fields, the SMA can detect and characterize magnetic fields by measuring polarity.

“Despite the potential impact of magnetic fields on galaxy structure, sub-mm observations of polarization in extragalactic sources remain sparse,” the authors explain in their paper. The first large-scale effort to measure this polarization was in 2002 when researchers published the first galaxy-averaged detection of sub-mm polarization. SOFIA (Stratospheric Observatory for Infrared Astronomy) provided another limited sample of dust polarization observations, but SOFIA ended in 2022.

Other efforts were made to detect the magnetic fields in the starburst regions, but they lacked the resolution to see the two regions separately. If each region or nuclei had different polarizations, the low resolution would dilute the polarization, possibly even making the magnetic fields undetectable. The authors explain that their efforts have overcome this problem. “We here present the results of sub-mm polarization observations of Arp220 at subarcsecond resolution using the Submillimeter Array. These are capable of resolving the separate nuclei and thus avoiding this dilution problem,” the authors write.

The authors explain that they detected polarized dust with a 6 sigma significance associated with the brighter, western nucleus. Six Sigma is a very strong detection, indicating a significant level of polarization created by powerful magnetic fields.

For Arp 220 to be undergoing starburst activity, a lot of cold gas needs to be concentrated in the starburst regions. However, starburst activity means a lot of young stars are forming. Young stars generate a lot of heat that disperses gas, creating an obstacle for continued star formation.

“To stop this happening, you need to add something to hold it all together – a magnetic field in a galaxy, or the lid and weight of a pressure cooker,” said lead author Clement in a press release.

NASA/ESA/CSA/STScI

“This is the first time we’ve found evidence of magnetic fields in the core of a merger,” Clements said, “but this discovery is just a starting point. We now need better models to see what’s happening in other galaxy mergers.”

Astronomers have long been puzzled by starburst galaxies, especially their unusually high star formation rate (SFR). When galaxies merge and become starburst galaxies, they appear to convert gas into stars more efficiently than standalone galaxies.

Astrophysicists have theorized about this property of starburst galaxies and what could cause it. Previous theoretical models have suggested that magnetic fields could help restrict the gas from dissipating, driving the starburst activity. However, this is the first time scientists have observed these fields.

This figure from the study shows the polarization angle on the left and the magnetic field angle on the right. “We detect polarized dust emission in Arp220 for the first time, with a peak polarized flux intensity
of 2.7 +/- 0.45 mJy close to the position of the western nucleus,” the authors write. The ellipses represent the rotating molecular disks, with the white crosses representing the positions of the nuclei. Image Credit: Clements et al. 2025.

According to study co-author Qizhou Zhang, also from the CfA, the magnetic fields do more than suppress the dispersal of star-forming gas. “Another effect of the magnetic field is that it slows down the rotation of gas in the disks of merging galaxies. This allows the force of gravity to take over, pulling the sluggish gas inward to fuel starbursts,” said Zhang. “The SMA has been one of the leading telescopes for high angular resolution observations of magnetic fields in molecular clouds in the Milky Way. It’s great to see that this study breaks new ground by measuring magnetic fields in merging galaxies.”

In contrast with observations of other nearby galaxies, the direction of the magnetic fields doesn’t seem to correspond with galactic outflow directions.

There are some other critical findings regarding the orientation of Arp 220’s magnetic fields. “Dust emission polarization is oriented roughly perpendicular to the molecular disk in the western nucleus,” the authors write. The polarization of dust emission is directly related to the orientation of the magnetic field, and this perpendicular orientation indicates that the magnetic field is oriented to the plane of the galactic disk. However, the magnetic field could be in the process of being reordered as the pair of nuclei interact. This points out how complex the merger environment is and how the magnetic fields are affected.

Finding these magnetic fields in Arp 220 strongly indicates that they’re behind the unexpected starburst activity. But it’s only one data point. A larger sample is needed to reaffirm these findings. The research team’s next step is to aim ALMA, the SMA’s big brother, at other galaxies like Arp 220 to see if they also have these magnetic fields.

“While the observations described here deal with just a single target, the nearest and brightest ULRG, Arp220, they suggest that magnetic fields may play a significant role in the processes underway in the innermost regions of major mergers,” the authors explain in their paper’s conclusion. “Observations in
search of dust polarization in the inner regions of other local ULIRGs and other DSFGs (Dusty Star-Forming Galaxy) are thus likely to bring new insights into these objects and how they evolve.”

Press Release: Astronomers Detect Missing Ingredient in Cooking Up Stars

New Research: Polarized Dust Emission in Arp220: Magnetic Fields in the Core of an
Ultraluminous Infrared Galaxy

The post Star Formation Might Depend on Galactic Magnetic Fields appeared first on Universe Today.

Wandering salamanders pump their toes full of blood before lifting their feet, a trick that may help them release their sticky grip while conserving energy

Global warming is helping rats thrive in major cities around the world, with Washington DC seeing the fastest growth in rats

New Zealand is the first country in the world to give natural geographic features the status of personhood, with all the rights of a human being. It was first done to Te Urewera, a remote area of the North Island, then to the North Island’s Whanganui River. Now CNN and Breaking Views (headlines below) report that personhood has been tranted to a third feature, the volcano Mount Taranaki, also on the North Island, and located here:

M.Bitton, CC BY-SA 4.0, via Wikimedia Commons

A bit about it from Wikipedia:

Taranaki Maunga, also known as Mount Egmont) is a dormant stratovolcano and legal person in the Taranaki region on the west coast of New Zealand’s North Island.  At 2,518 metres (8,261 ft), it is the second highest mountain in the North Island, after Mount Ruapehu. It has a secondary cone, Fanthams Peak (Māori: Panitahi), 1,966 metres (6,450 ft), on its south side.

It’s a lovely mountain, and yet I didn’t see it when I visited the country a few years ago. Here are two photos from Wikipedia:

The caption for this one is: “Mount Taranaki (Mt Egmont), from Inglewood, New Zealand, 1896”

State Library of New South Wales, DL PX 150, Public domain, via Wikimedia Commons

Click on the headlines below to read. The first article is from CNN, the second from Breaking Views. Quotes will be from CNN unless indicated otherwise.

Although the mountain was apparently sacred to the indigenous Māori people (it was considered an “ancestor”), it was renamed and claimed by Europeans who colonized the country. When the Treaty of Waitangi was signed in 1840, ceding all Māori lands to their respective tribes (the treaty wasn’t signed by all indigenous tribes and has been subject to conflicting interpretations for nearly two centuries), the Māori could reasonably claim that the mountain had been stolen from them. On January 30, the New Zealand government redressed this appropriation by giving the mountain the same status as a human being. From CNN:

A mountain in New Zealand considered an ancestor by Indigenous people was recognized as a legal person on Thursday after a new law granted it all the rights and responsibilities of a human being.

Mount Taranaki — now known as Taranaki Maunga, its Māori name — is the latest natural feature to be granted personhood in New Zealand, which has ruled that a river and a stretch of sacred land are people before. The pristine, snow-capped dormant volcano is the second highest on New Zealand’s North Island at 2,518 meters (8,261 feet) and a popular spot for tourism, hiking and snow sports.

The legal recognition acknowledges the mountain’s theft from the Māori of the Taranaki region after New Zealand was colonized. It fulfills an agreement of redress from the country’s government to Indigenous people for harms perpetrated against the land since.

How can a mountain be a person?

The law passed Thursday gives Taranaki Maunga all the rights, powers, duties, responsibilities and liabilities of a person. Its legal personality has a name: Te Kāhui Tupua, which the law views as “a living and indivisible whole.” It includes Taranaki and its surrounding peaks and land, “incorporating all their physical and metaphysical elements.”

A newly created entity will be “the face and voice” of the mountain, the law says, with four members from local Māori iwi, or tribes, and four members appointed by the country’s Conservation Minister.

The vote on giving the mountain personhood was unanimous in Parliament: 123 to 0.  It’s not completely clear to me what “personhood” means, except that the Māori get to be guardians of the mountain.  Here’s a bit from CNN:

The mountain’s legal rights are intended to uphold its health and wellbeing. They will be employed to stop forced sales, restore its traditional uses and allow conservation work to protect the native wildlife that flourishes there. Public access will remain.

And from Breaking Views:

The legislation, passed by Labour in 2023, recognises Mount Taranaki, alongside its companion peaks, as a living ancestor with its own identity and rights.

. . . . The park surrounding Mount Taranaki will be renamed Te Papa-Kura o Taranaki, with management plans requiring dual approval from the conservation minister and iwi leaders.

Under the Taranaki Maunga Collective Redress Bill, an oversight committee (Te Tōpuni Kōkōrangi) of four iwi and four Crown representatives will govern and set cultural and spiritual values.

A conservation board, including three iwi representatives, will work with the Department of Conservation on daily management. All governance costs will be funded by the Crown. [The New Zealand government.]

There are a couple of issues here. As I said, I have no objection to giving the mountain special conservation status and letting the Māori have most of the governance, though this could create a slippery-slope situation in which every geographic feature could be considered special to the Māori before colonization.

But what is added by giving the mountain “personhood”? As far as I can see, nothing substantive save the recognition that the mountain is an “ancestor”. Yet that formalizes a supernatural belief, which should not be the case.  Everything else, like damaging the mountain, building forbidden structures on it and the like, can come under the rubric of conservation.

But, as you can see by the unanimous vote, Kiwis of European-ancestry are in no mood to buck the tide of the sacralization of indigenous claims.  Would we name the Grand Canyon as a “person” (“Mr. Canyon”?) if a Native America group regarded it as sacred?  Mt. McKinley was renamed, Mt. Denali as that was the traditional name of the local indigenous people. I have no issue with that (Trump, of course, wants to remove the indigenous name), but if the mountain was seen to have spiritual or sacred properties (I doubt that it did, but can find no information), should we deem the mountain a person?

As far as I can see, considering geographic features “people” because they had supernatural and spiritual aspects is a violation of the First Amendment. Now New Zealand has no such provision (it doesn’t even have a constitution), so the government can do what it wants. And what it wants is to give the Māori exactly what they demand.

And all of this is happening at a fraught time in New Zealand’s politics. What is happening is that there is a government bill to codify the provisions of the Treaty of Waitangi so they can become clear law, instead of the nebulous provisions (there are different translations and different interpretations) that people cite to justify what they want. (A common theme you’ll see here is the Māori reliance on the treaty to demand equal rights to teach their “ways of knowing” in schools, a demand that cannot possibly be derived from the three provisions of the Treaty.) In other words, the bill would create a sort of New Zealand constitution based on the Treaty.

But the bill is not going to pass.  As CNN says:

The unity provided brief respite in a tense period for race relations in New Zealand. In November, tens of thousands of people marched to Parliament to protest a law that would reshape the Treaty of Waitangi by setting rigid legal definitions for each clause. Detractors say the law — which is not expected to pass — would strip Māori of legal rights and dramatically reverse progress from the past five decades.

The “progress” to which they refer is largely the increasing hegemony of Māori rights and privileges over the past five decades, to the point that, though they constitute only 18% of the inhabitants, they claim at least half of the rights: a huge form of affirmative action. Now it’s clear that Māori were mistreated and subject to bigotry in the past, but what we see happening in New Zealand now is not just an attempt to create equal opportunities for all, or even equity for all groups (to me the former is okay while the latter is not). The goal is larger than equity:  to try to create a Super Equity in which indigenous people get at least half of everything, including half the time in science class.

That would be a debacle, but it’s happening, and it will happen far beyond the schools. The result will be the erosion of merit in favor of identity—exactly what has happened in the U.S.

New Zealand really does need a bill like this, but it needs a Constitution even more. Neither will come to pass.

Oh, and I would be remiss if I didn’t add that in the U.S., corporations have been granted certain privileges and responsibilities of “personhood”, including the right to be sued and to be subject to civil or criminal charges. I have no dog in that fight, but there’s nothing spiritual or sacred about it.

h/t: Christopher

Every exoplanet discovery is an opportunity to refine models of planet formation, solar system architecture, habitable zones, and habitability itself. Each new planet injects more data into the scientific endeavour to understand what’s going on and how things got this way. However, some planets have such unusual characteristics that they invite a deeper focus and intense follow-up observations.

That’s the case for one new exoplanet. It’s a super-Earth on an unusual orbit that’s giving astronomers an opportunity to test the ideas of habitability and optimistic and pessimistic habitable zones.

The planet is named HD 20794 d, and it orbits a Sun-like star about 20 light-years away. Its eccentric orbit takes it from 0.7 to 1.5 AU from its host star. It spends half of its time beyond the putative habitable zone before travelling back into the zone and slightly inside of it.

Could life somehow survive on a planet like this?

In stellar terms, the exoplanet is right next door, and since the star is bright, the planet is in a great location for observation and study. The discovery of the planet was first reported in 2023, and in new research, a team of astronomers confirms its existence and points out how it’s in a prime location for further study.

The new research is “Revisiting the multi-planetary system of the nearby star HD 20794,” and it’s published in the journal Astronomy and Astrophysics. The lead author is N. Nari from the Instituto de Astrofísica de Canarias in Spain.

Though HD 20784 d was discovered a couple of years ago, it remained a candidate until this new research confirmed it. The planet was known as the 640 d planet because it appeared to have an approximately 640-day orbit around its star. This new study adds more observational details to the planet, including how it’s a great candidate for follow-up atmospheric study. Because it moves in and out of its star’s habitable zone, it’s an opportunity to learn more about habitability and to test and refine scientific models.

“HD 20794, around which HD 20794 d orbits, is not an ordinary star,” explains Xavier Dumusque, Senior Lecturer and researcher in the Department of Astronomy at the University of Geneva and co-author of the study. “Its luminosity and proximity make it an ideal candidate for future telescopes whose mission will be to observe the atmospheres of exoplanets directly.”

Since it’s so close and bright, it’s already been the target of observations. Exoplanetologists have 20 years of data from facilities like HARPS and ESPRESSO to work with. HARPS is the High Accuracy Radial Velocity Planet Searcher, and ESPRESSO is the Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations.

“HD 20794 has been part of long radial velocity (RV) surveys dedicated to the search for low-amplitude long-period signals around solar-type stars, with hundreds of nights of observations with HARPS and ESPRESSO spanning more than 20 years available,” the paper states.

Detecting the super-Earth was difficult. Twenty years of data helped, but it took the development of a new algorithm to find the planet in the data. It’s called YARARA, and it’s a data reduction algorithm recently developed at the University of Geneva (UNIGE). Planets are often obscured by noise in the data, and YARARA can sift through the data and filter out the noise.

“We analyzed the data for years, carefully eliminating sources of contamination,” explained Michael Cretignier, a post-doctoral researcher at Oxford University, co-author of the study and developer of YARARA. Cretignier is also the lead author of the 2023 paper that reported the initial detection of HD 20794 d.

The discovery of HD 20794 d has made astronomers want to monitor the star more closely. “The low stellar activity level and the brightness of HD 20794 has made this target one of the most well-suited candidates for this purpose,” the authors explain.

The system hosts three planets, and this research concludes that all three of them are super-Earths, though there’s some possibility that HD 20794 d could be a mini-Neptune with a non-negligible H/He atmosphere. It follows an elliptical orbit with an eccentricity of 0.45 and has about 5.8 Earth masses.

The planet’s most interesting feature is its orbit. “The orbital period of HD 20794 d resides both in the optimistic and conservative HZ,” the authors write in their research. “This is an interesting result because we do not have many examples of planets with M < 10 Earth masses with mass measurement from RVs in the HZ of Sun-like stars.”

The planet travels between the inner edge of its star’s HZ (0.75 AU) and outside of it (2 AU) as it follows its eccentric orbit. If the planet hosts water, it would shift from its frozen state to its liquid state and back again repeatedly.

This figure from the new research shows how HD 20794 d’s eccentric orbit takes it in and out of both the optimistic and pessimistic habitable zones during its 647-day orbit. Image Credit: Nari et al. 2025.

This is an exciting planet. Not only does it follow an unusual orbit, but it’s close to and orbits a bright star. “The closeness of the planetary system, summed with the distance of the star and the planet and the planet-to-star contrast ratio, makes this planet a good candidate for future atmospheric characterization through direct imaging facilities,” the authors write.

One of those facilities is the ANDES instrument on the European Southern Observatory’s Very Large Telescope (VLT). ANDES stands for ArmazoNes high Dispersion Echelle Spectrograph. AndES is a high-resolution instrument that can search for signs of life on Earth-like planets. The detection of biosignatures from exoplanet atmospheres is listed as one of the instrument’s top science cases.

Signs of biosignatures on HD 20794 d won’t jump out at scientists. It’ll take a lot of work among multiple scientific disciplines. Some of that work has begun.

Researchers at the Centre for Life in the Universe (CVU) at the UNIGE’s Faculty of Science are already studying the conditions for the planet’s habitability.

Press Release: A super-Earth laboratory for searching life elsewhere in the Universe

Paper: Revisiting the multi-planetary system of the nearby star HD 20794

The post A Super-Earth to Test the Limits of Habitability appeared first on Universe Today.

A carnation-like nanostructure could someday be used in bandages to promote wound healing. Researchers report that laboratory tests of their nanoflower-coated dressings demonstrate antibiotic, anti-inflammatory and biocompatible properties. They say these results show these tannic acid and copper(II) phosphate sprouted nanoflower bandages are promising candidates for treating infections and inflammatory conditions.

According to the Giant Impact Hypothesis, the Moon formed from a massive impact between a primordial Earth and a Mars-sized object (Theia) roughly 4.5 billion years ago. This is largely based on the study of sample rocks retrieved by the Apollo missions and seismic studies, which revealed that the Earth and Moon are similar in composition and structure. Further studies of the surface have revealed features that suggest the planet was once volcanically active, including lunar maria (dark, flat areas filled with solidified lava).

In the past, researchers suspected that these maria were formed by contractions in the interior that occurred billions of years ago and that the Moon has remained dormant ever since. However, a new study conducted by researchers from the National Air and Space Museum (NASM) and the University of Maryland (UMD) revealed small ridges on the Moon’s far side that are younger than those on the near side. Their findings constitute another line of evidence that the Moon still experiences geological activity billions of years after it formed.

The research was conducted by Cole Nypaver and Thomas R. Watters, a postdoctoral student and Senior Geologist with the NASM’s Center for Earth and Planetary Studies at the Smithsonian Institute. They were joined by Jackie Clark, an Assistant Research Scientist with UMD’s Department of Geology. The paper detailing their findings, “Recent Tectonic Deformation of the Lunar Farside Mare and South Pole–Aitken Basin,” recently appeared in the Planetary Science Journal.

Based on previous research, scientists have determined that the Moon once had a magnetic field. Like Earth’s, this field was powered by a dynamo in the Moon’s interior caused by a liquid outer core (surrounding a solid inner core) that rotated opposite to its axial rotation. However, crystallization began in the Moon’s core about 4 billion years ago, causing this dynamo to disappear between 2.5 and 1 billion years ago. This led to the disappearance of its magnetosphere and volcanic activity, ceasing about 3 billion years ago. As Clark summarized in a recent UMD press release:

“Many scientists believe that most of the Moon’s geological movements happened two and a half, maybe three billion years ago. But we’re seeing that these tectonic landforms have been recently active in the last billion years and may still be active today. These small mare ridges seem to have formed within the last 200 million years or so, which is relatively recent considering the moon’s timescale.”

Using advanced mapping and modeling, Nypang, Watters, and Clark found 266 previously unknown small ridges on the Moon’s far side. These were largely arranged in groups of 10 to 40 ridges that likely formed in narrow areas 3.2 to 3.6 billion years ago where underlying weaknesses in the lunar crust may have existed. Based on a technique known as “crater counting,” the team found that these ridges were notably younger than other features in their surroundings.

“Essentially, the more craters a surface has, the older it is; the surface has more time to accumulate more craters,” said Clark. “After counting the craters around these small ridges and seeing that some of the ridges cut through existing impact craters, we believe these landforms were tectonically active in the last 160 million years.”

New measurements of lunar rocks have demonstrated that the ancient Moon generated a dynamo magnetic field in its liquid metallic core (innermost red shell). Credit: Hernán Cañellas/Benjamin Weiss

The team also noted that the ridges observed on the far side of the Moon were similar in structure to ones found on the near side. This suggests both were created by the same forces, possibly by shallow moonquakes first detected by the Apollo missions. Scientists have since deduced that these are caused by a combination of shifts in the Moon’s orbit and its gradual shrinking – which explains why the Moon still experiences landslides. Understanding the factors that shape the lunar surface is of immense importance to future lunar missions.

As Clark indicated, this presents opportunities for further studies of lunar evolution:

“We hope that future missions to the moon will include tools like ground penetrating radar so researchers can better understand the structures beneath the lunar surface. Knowing that the moon is still geologically dynamic has very real implications for where we’re planning to put our astronauts, equipment and infrastructure on the moon.”

Further Reading: University of Maryland, The Planetary Science Journal

The post Evidence of Recent Geological Activity on the Moon appeared first on Universe Today.

Speaking of FIRE and free speech, I got an email from that organization this morning about how The University of Connecticut has altered the traditional Hippocratic Oath to reflect Social Justice considerations. (It’s far from the only med school that has done this.)  This can be considered compelled speech, which students are supposed to recite even if they disagree with it. You can see the traditional forms of the oath here, and hear the newer one here, starting at 44:12. The students are asked to repeat the oath after the speaker.

The new oath is also transcribed below at the Do No Harm site; I’ve put in a red box the parts that disturbed FIRE:

Here’s the email I got from FIRE:

Incoming medical students typically recite the Hippocratic Oath, a pledge to do no harm to patients. But last August, the University of Connecticut required freshmen medical students to recite an ideologically-charged version of the Hippocratic Oath that reads, in part, 

“I will strive to promote health equity. I will actively support policies that promote social justice and specifically work to dismantle policies that perpetuate inequities, exclusion, discrimination and racism.”

The school violated students’ First Amendment rights against compelled speech by forcing them to affirm contested political viewpoints. The oath effectively emboldens administrators to punish students who, in their opinion, failed to uphold these nebulous commitments. What, exactly, must a medical student do to “support policies that promote social justice”? If a student disagrees with UConn’s definition of “social justice” or chooses not to promote it in the prescribed way, could she be dismissed for violating her oath?

Today, free speech group FIRE called on UConn to make clear that students may refrain from reciting all or part of the oath without any threat of penalty and will not have to affirm any political viewpoints as a condition of their education at the school.

FIRE Program Officer Ross Marchand: “The constant threat of discipline hangs over UConn students. At any time, administrators could decide that a student has broken the vague, partisan oath that she was forced to take. Even an insufficient commitment to ‘social justice’ could land a student in trouble. UConn prioritized politics and ideology above education and the First Amendment, creating a culture of compulsion and fear.”

Thanks! Check out our letter to the school and our blog post.

The blog post notes this:

In August, UConn required the incoming class of 2028 to pledge allegiance not simply to patient care, but to support diversity, equity, and inclusion. The revised oath, which was finalized in 2022, includes a promise to “actively support policies that promote social justice and specifically work to dismantle policies that perpetuate inequities, exclusion, discrimination and racism.”

This practice is a grave affront to students’ free speech rights. In January, FIRE called the medical school to confirm that the oath is mandatory; an admissions staff member told us it was. We are asking them to confirm this in writing.

As a public university, UConn is strictly bound by the First Amendment and cannot compel students to voice beliefs they do not hold. Public institutions have every right to use educational measures to try to address biases they believe stymie the healthcare system. But forcing students to pledge themselves to DEI policies — or any other ideological construct — with which they may disagree is First Amendment malpractice. This is no different than forcing students to pledge their allegiance to a political figure or the American flag.

. . .   and adds that these “Social Justice Oaths” are not uncommon:

UConn isn’t alone in making such changes to the Hippocratic Oath. Other prestigious medical schools, including those at Harvard, Columbia, Washington University, Pitt Med, and the Icahn School of Medicine, have adopted similar oaths in recent years. However, not all schools compel students to recite such oaths. When we raised concerns in 2022 about the University of Minnesota Medical School’s oath, which includes affirming that the school is on indigenous land and a vow to fight “white supremacy,” the university confirmed that students were not obligated to recite it. That’s the very least UConn could do to make clear that it puts medical education — and the law — ahead of politics.

The letter suggests that taking this oath is not optional but mandatory. From FIRE’s letter from Marchand to Dean Bruce Liang of the UConn Medical School:

FIRE called the UConn School of Medicine Admissions Office to clarify whether the oath, including these additions, is mandatory for students participating in the ceremony. A staff member confirmed that this oath is required for all incoming students. We have also emailed the admissions office to confirm the mandatory nature of the oath but have yet to receive a
written response.

. . . While UConn may encourage students to adopt the views contained in the oath, the First Amendment bars the university from requiring them to do so.  The First Amendment protects not only the right to speak but the right to refrain from speaking. As the Supreme Court has notably held, public institutions may not compel individuals to “declare a belief [and] … to utter what is not in [their] mind.”8 Requiring new students to pledge their loyalty to a particular ideology violates students’ expressive rights, is inconsistent with the role of the university as a bastion of free inquiry, and cannot lawfully be enforced at a public institution. UConn can require students to adhere to established medical standards, but this authority cannot be abused to demand allegiance to a prescribed set of political views—even ones that many students may hold.  Specifically, the school may not compel students to pledge to support or promote concepts such as “social justice” and “equity,” notions that have long been the subject of intense political polarization and debate

You’d think that these deans would know something about the prohibition about compelled speech, but of course they cannot conceive that anybody would opopose the social justice-y bits of their new Oath. They clearly need a lesson in the First Amendment!

Finally FIRE asks for a response in two weeks:

FIRE calls on UConn to make clear that students may refrain from reciting all or part of the oath without any threat of penalty and will not have to affirm any political viewpoints as a condition of their education at the school.
We request receipt of a response to this letter no later than the close of business on February 14, 2025

You can go to this page to send a quick fill-in-the-form letter. I did.

The odds of a sizable asteroid striking Earth are small, but they’re never zero. Large asteroids have struck Earth in the past, causing regional devastation. A really large asteroid strike likely contributed to the extinction of the dinosaurs. So we shouldn’t be too surprised that astronomers have discovered an asteroid with a better than 1% chance of striking our world. Those odds are large enough we should keep an eye on them, but not large enough that we should start packing bags and fleeing to the hills.

The rock, named 2024 YR4, is somewhere between 40 – 100 meters wide, which would make it a “city killer” asteroid. If it does strike Earth, it wouldn’t decimate human civilization and cause mass extinctions, but it could destroy a heavily populated area if it struck a city, or trigger a tsunami if it struck the ocean. It would back a punch similar to the 1908 Tunguska event in Northern Siberia.

So what is the overall risk of 2024 YR4? The scale most commonly used for asteroid impact risks is known as the Torino Scale. It combines the overall size and relative speed of an object with its odds of impact to assign a number ranging from 0 to 10, where 0 means there is no risk of impact and 10 means it’s time to call Bruce Willis to save us all from extinction. That said, the highest number any asteroid has had on the scale is 4. This was for the asteroid Apophis soon after its discovery, which has now been downgraded to 0.

Currently, 2024 YR4 has a 3 on the scale, which means it “merits attention by astronomers.” It is currently the only object with a number other than 0 on the Torino Scale, and it means a couple of things come into play. The first is that the International Asteroid Warning Network (IAWN) will work to pin down the orbit of the asteroid. Chaired by NASA, the IAWN coordinates with observatories around the world to make detailed observations of 2024 YR4. It will take time to gather enough data. But what will likely happen is that they will determine there is no risk of collision, and 2024 YR4 will be demoted to 0 on the scale.

The second thing initiated is the Space Mission Planning Advisory Group (SMPAG), chaired by the European Space Agency. They have a scheduled meeting next week when there will be some initial discussions about a possible mission to 2024 YR4 to shift its orbit. If we do find there is a real risk of impact, this group would ramp up quickly. But again, this isn’t likely.

Statistically, asteroids the size of 2024 YR4 strike Earth every couple thousand years or so. This is why astronomers track these objects and are constantly looking for more. So even though the odds of an impact are never zero, with planning and preparation we should be able to ensure that any real risk can be mitigated.

The post An Asteroid Has a 1% Chance of Impacting Earth in 2032 appeared first on Universe Today.

A team of scientists has made the first experimental measurements of laser-induced motions of miniature lightsails in the lab.

A team of scientists has made the first experimental measurements of laser-induced motions of miniature lightsails in the lab.

A study assessed the impact of electric fans on the body core temperature and heart rate of 18 participants aged 65-85 years, who were exposed to a simulated extreme indoor environment of 36 degrees Celsius with 45 percent relative humidity for eight hours. The results showed participants were unaffected by fan use, with all three of the experimental conditions resulting in an average body core temperature of 38.3 C and heart rate of 100 beats per minute.

It's been known for some time that radiation impacts the structural integrity of concrete. However, until now the details of this were unknown. Researchers can finally demonstrate what properties of concrete affect its structural characteristics under different neutron radiation loads. Their findings raise some concerns whilst reducing others; for example, quartz crystals in concrete can heal themselves, potentially allowing some reactors to run for longer than initially thought possible.

Researchers measured very precisely atomic masses of radioactive lanthanum isotopes and found an interesting feature in their nuclear binding energies. The discovery provides essential data for understanding how elements heavier than iron are produced in the Cosmos and triggers new research to elucidate the underlying nuclear structure causing this unexpected change in nuclear binding energies.

Researchers measured very precisely atomic masses of radioactive lanthanum isotopes and found an interesting feature in their nuclear binding energies. The discovery provides essential data for understanding how elements heavier than iron are produced in the Cosmos and triggers new research to elucidate the underlying nuclear structure causing this unexpected change in nuclear binding energies.

Researchers are breaking limits by increasing the temperature multiferroics can operate at, from room temperature up to a blistering 160 degrees Celsius.