Science

Up until recently, astronomy was reliant entirely on electromagnetic waves. While that changed with the confirmation of gravitational waves in 2016, astronomers had developed fundamental frameworks in the electromagnetic spectrum by that point. One critical framework broke the spectrum into three categories based on their wavelength - infrared, optical, and ultraviolet. To astronomers, each of these categories was created by a different physical phenomenon, and monitoring each gave its insight into what that phenomenon was doing, no matter what the other spectra said. This was especially prevalent when researching galaxies, as infrared and optical wavelengths were used to analyze different aspects of galaxy formation and behavior. However, Christian Kragh Jespersen of Princeton's Department of Astrophysics and his colleagues think they have found a secret that breaks the entire electromagnetic framework - the optical and infrared are connected.

It’s easy to measure the rotation rate of terrestrial planet by tracking surface features but the gas and ice giants pose more of a problem. Instead, previous studies have relied upon indirect measures like measuring the rotation of their magnetic fields. Now a team of astronomers have used the Hubble Space Telescope to refine the rotation rate of Uranus with an incredible level of accuracy. This time though, instead of studying the rotation of the magnetic field, they tracked aurora to measure one rotation!

We all know that black holes can devour stars. Rip them apart and consume their remnants. But that only happens if a star passes too close to a black hole. What if a star gets close enough to a star to experience strong tidal effects, but not close enough to be immediately devoured? This scenario is considered in a recent paper on the arXiv.

An investigation of the changing behaviour of a single quantum bit through time has uncovered a tantalising similarity to the geometry of three-dimensional space

Researchers completed one of the most comprehensive studies to date on the risks of using AI models to develop software. In a paper, they demonstrate how a specific type of error could pose a serious threat to programmers that use AI to help write code.

It’s incredibly tricky to pin down the origin of the language that led to the words spoken everywhere between Spain and India – and it’ll be even harder to be sure we’ve got it right

Unusual rocks on an Icelandic beach were dropped there by icebergs, adding to evidence that an unusually cool period preceded the collapse of the Roman Empire

In 2021, the Office of the Director of National Intelligence (ODNI) released a report detailing recently-declassified information on Unidentified Aerial Phenomena (UAP). Since then, the Department of Defense has released annual reports on UAP through the All-domain Anomaly Resolution Office (AARO). Nevertheless, there is still a lack of publicly available scientific data on the subject. To address this, a new study led by the Harvard-Smithsonian Center for Astrophysics (CfA) and the Galileo Project proposes an All-Sky Infrared Camera to search for potential indications of extraterrestrial spacecraft.

Readers and correspondents are asking me what i think about the just-revealed “de-extinction” of the dire wolf by Colossal Biosciences, and the firm’s attempt to bring back the woolly mammoth, too.  I don’t want to write much about this now because I’ve put up a few posts about the mammoth before, and Matthew has expressed similar sentiments in his book As Gods: A Moral History of the Genetic Age.  Further, I am writing my take for another venue, so I will just say this about the genetics of the de-extinction efforts so far:

My general sentiments are these: attempts to bring back extinct species as outlined so far are not only scientifically misguided, but are journalistically mis-reported by the press.  That is, the press is, by and large, distorting what has been done scientifically, pretending that an animal with only a few cosmetic gene edits is actually identical to an extinct species. Further, Colossal seems happy enough to let this misconception be widely reported (to be fair, there are some decent articles about the science of de-extinction, and I’ll link to a few below).

The main problem, as I said, is the pretense that changing a living species by editing just a handful of genes (20 max so far) to get something that looks like the extinct “dire wolf” is not the same thing as re-creating a dire wolf.  That species undoubtedly had hundreds or thousands of genetic differences from the gray wolf, including genes affecting metabolism and behavior—genes that we do not know.  Further, control regions of genes, which are outside protein-coding regions, undoubtedly are involved in differences between extinct species and their relatives. But we don’t know where these regions are and so cannot use them for genetic editing.

All of this means that, in my view, de-extincting species is a cosmetic rather than a serious genetic project, designed to produce gee-whiz animals to entertain rich people and to wow children.  Such animals, especially the highly touted de-extincted mammoth, which mammoth expert Tori Herridge calls “an elephant in a fur coat”, would certainly not survive in their original habitat.  Further, proponents’ claims that de-extinction would be a fantastic conservation effort , and could even mitigate global warming. are totally unsupported speculations.

There are two such efforts that have received all the press: the de-extinction of the woolly mammoth and of the dire wolf; the latter effort has produced some pups, but they are not dire wolves. We will never see woolly mammoths, though Colossal promises that they’ll be stomping about in three years!

Mammoth (see my website posts above) There are many reasons why this project is a non-starter.  The evidence that it is feasible rests solely on the production of “woolly mice,” which are mice that have had 8 edits in only 7 genes (remember, mice are easier to work with than elephants!).  Only two of the genes that were changed were edited in a way to conform to known mammoth genes. The rest are simply using mouse mutants known to affect hair texture, color, and waviness in lab mice.  Thus we have a woolly mouse—not anything close to a woolly elephant. Yes, it’s cool to make multiple changes in multiple genes at once, but this is not a new technology. The novelty will be to edit an elephant egg cell in a way that the edited cell can be implanted in an Asian elephant and develop into a woolly mammoth. If you really want something popping out of an Asian elephant that is close to a woolly mammoth, you will never get it. In fact, the whole project seems impossible to me. And the conservation results touted by Colossal–that the re-exincted mammoths, released on the tundra, will keep carbon in the permafrost and not in the atmosphere–are purely speculative.

Dire wolf:  Scientists edited a gray wolf stem cell, changing 20 genes. Fifteen of the edited genes were designed from from the sequenced dire-wolf genome (again, sequencing an extinct organism is a feat, but not one developed by Colossal), while five others were taken from known genes that change dogs or wolves (the articles aren’t clear on which genes were used, as Colossal is keeping that secret).  The edited cell, as an egg, was placed into a “large dog” to be the surrogate mom, and then extracted via caesarian section (did the dogs survive this procedure?) They get a whitish wolf with some dog or gray-wolf genes, not dire wolf genes. All of the changes are said to affect things like fur color, body size, and tooth and jaw configuration–traits that differentiated the dire wolf from the gray wolf.  As I noted, we wind up with a gray wolf (and remember, domestic dogs are descended from gray wolves, and can even be considered gray wolves, as they mate with each other and can produce fertile hybrids); we get a gray wolf with a couple of changed traits to make it look like what we think the dire wolf looked like. (We are not sure, for example, that the dire wolf had white fur.)

Neither the mammoth nor the dire wolf results are published in a peer-reviewed journals, though the woolly mouse experiment has been languishing on bioRΧiv for a while but hasn’t been published.

Here are some links, most but not all of them pointing out problems with de-extinction projects:

Colossal’s explanation of  the mammoth project. (Note that they also want to de-extinct the dodo and the thylacine, or marsupial wolf.)

Colossal’s account on the dire wolf result.

Nature paper by Ewen Calloway on why the woolly mouse isn’t a credible step towards a woolly mammoth.

Nature paper by Tori Herridge explaining why she turned down a position as advisor to Colossal on the mammoth

Article in Ars Technica by Nitin Sekar, WWF authority on conserving the Asian elephant, explaining why “Mammoth de-extinction is bad conservation.”

Guardian paper by Adam Rutherford explaining why trying to de-extinct the Woolly Mammoth is not only unethical, but impossible.

NYT article by Carl Zimmer on the dire wolf, a good summary and not nearly as critical as his Bluesky post below.

New Yorker article by D. T. Max on the dire wolf, somewhat windy and credulous (archived here).

Article in the MIT Technology Review by Antonio Regalado: “Game of clones: Colossal’s new wolves are cute, but are they dire?”

Tweets and posts:

Tori Herridge’s posts on both Twitter and Bluesky are an informative and hilarious critique of the woolly mouse/mammoth projects. Get started with this one if you’d like (it’s a thread):

[though as an aside, honestly Colossal missed a trick not going for the Fgfr1/2 double mutant — I mean, have you seen a more mammothy-mouse?!]*MAMMOUSE KLAXON*www.nature.com/articles/s41…

— Tori Herridge (@toriherridge.bsky.social) 2025-03-05T00:20:55.808Z

Journalist Asher Elbein and a commenter on the misleading Dire Wolf.

Here Carl Zimmer points out that Colossal’s dire wolf is not a dire wolf. This is a bit more frank than his NYT article!

It's not a dire wolf. It's a gray wolf clone with 20 dire-wolf gene edits, and with some dire wolf traits. And here's my story! Gift link: http://www.nytimes.com/2025/04/07/s…

— Carl Zimmer (@carlzimmer.com) 2025-04-07T16:38:15.772Z

Adam Rutherford (read his Guardian article on mammoths above) is particularly critical of the Dire Wolf project. I love the first tweet asserting that journalists who don’t do due diligence are making people stupider. That’s true, and it also makes people misunderstand (and possibly eventually mistrust) science:

Public service announcement. They are not Dire Wolves. They have 20 single letter changes in their entire genomes. I’ve done shits with more mutations. Every time journalists write up a Colossus press release, They are making people stupider. Client journalism by a ridiculous company.

— Adam Rutherford (@adamrutherford.bsky.social) 2025-04-07T20:02:25.283Z

GODDAMIT. IT’S NOT A RESURRECTED DIRE WOLF. 20 edits in 19,000 genes. IT’S NOT GOING TO AID CONSERVATION. EVERY WRITE UP THAT SWALLOWS AND REGURGITATES THIS GUFFERY WOLFSHIT IS DOING PR FOR A FUNDING ROUND.

— Adam Rutherford (@adamrutherford.bsky.social) 2025-04-08T12:05:49.778Z

Caveat emptor!

Oh, and for fun, here’s the Secretary of the Interior tweeting about how we shouldn’t worry so much about endangered species and pay more attention to “de-extincting” species.  But of course “de-extincting” isn’t going to do squat to keep existing species from waning. Burgum is off the rails here, entranced by the dire gray wolf.

Scientists have pioneered an influenza virus vector-based nasal spray vaccine platform and developed a nasal spray H5N1 avian influenza vaccine. During the early COVID-19 pandemic, this platform enabled the rapid development of a nasal spray vaccine in collaboration with mainland China's Wantai BioPharm. After completing Phase 1-3 clinical trials, it was approved in 2022 as the world's first nasal spray COVID-19 vaccine.

While the daily ebb and flow of people across a city might seem chaotic, new research reveals underlying universal patterns. A study unveils fundamental spatiotemporal scaling laws that govern these population dynamics.

Researchers have developed a handheld device that could potentially replace stethoscopes as a tool for detecting certain types of heart disease.

A study has demonstrated the effectiveness of a technology-assisted intervention for perinatal depression.

Every galaxy is thought to form at the center of a dark matter halo. Stars are formed when gravity within dark matter halos draws in gas, but astrophysicists don't know whether star-free dark matter halos exist. An Diego astrophysicist has calculated the mass below which halos fail to form.

A new way to watch catalytic reactions happen at the molecular level in real time could lead to better fundamental understanding and planning of the important reactions used in countless manufacturing processes every day.

A tiny, soft, flexible robot that can crawl through earthquake rubble to find trapped victims or travel inside the human body to deliver medicine may seem like science fiction, but an international team is pioneering such adaptable robots by integrating flexible electronics with magnetically controlled motion.

A tiny, soft, flexible robot that can crawl through earthquake rubble to find trapped victims or travel inside the human body to deliver medicine may seem like science fiction, but an international team is pioneering such adaptable robots by integrating flexible electronics with magnetically controlled motion.

Researchers have worked to optimize the use of coffee grounds in pour-over coffee. They recommend pouring from as high as possible while still maintaining the water's flow. In particular, the group found the thick water jets typical of standard gooseneck kettles are ideal for achieving this necessary height and laminar flow. Displaced grounds recirculate as the water digs deeper into the coffee bed, allowing for better mixing between the water and the grounds, and thus, results in a stronger coffee with fewer beans.

Physicists have determined that the ideal technique for pour-over coffee can use up to 10 per cent fewer beans to make a cup just as flavoursome

The number of dinosaurs may have been stable before the asteroid impact, despite evidence that species were getting less diverse