il Post

2025-11-17 15:13:25

Sono morte le gemelle Kessler - Il Post
https://www.ilpost.it/2025/11/17/morte-gemelle-kessler/?utm_source=flipboard&utm_medium=activitypub

Pubblicato su News @news-ilPost

Sono morte le gemelle Kessler

Le famosissime cantanti e ballerine tedesche avevano 89 anni

^{Il Post}

https://www.ilpost.it/2025/11/16/fratelli-ditalia-piste-ciclabili-protesta/

404 Media

2025-11-15 16:23:35

Scientists Make Genetic Breakthrough with 39,000-Year-Old Mammoth RNA

Welcome back to the Abstract! These are the studies this week that reached back through time, flooded the zone, counted the stars, scored science goals, and topped it all off with a ten-course meal.

First, scientists make a major breakthrough thanks to a very cute mammoth mummy. Then: the climate case for busy beavers; how to reconnect with 3,000 estranged siblings; this is your brain on football; and last, what Queen Elizabeth II had for lunch on February 20, 1957.

As always, for more of my work, check out my book First Contact: The Story of Our Obsession with Aliens, or subscribe to my personal newsletter the BeX Files.

The long afterlife of Yuka the mammoth

Mármol Sánchez, Emilio et al. “Ancient RNA expression profiles from the extinct woolly mammoth.” Cell.

Scientists have sequenced RNA—a key ingredient of life as we know it—from the remains of a mammoth that lived 39,000 years ago during the Pleistocene “Ice Age” period, making it by far the oldest RNA on record.

The previous record holder for oldest RNA was sourced from a puppy that lived in Siberia 14,300 years ago. The new study has now pushed that timeline back by an extraordinary 25,000 years, opening a new window into ancient genetics and revealing a surprise about a famous mammoth mummy called Yuka.

“Ancient DNA has revolutionized the study of extinct and extant organisms that lived up to 2 million years ago, enabling the reconstruction of genomes from multiple extinct species, as well as the ecosystems where they once thrived,” said researchers led by Emilio Mármol Sánchez of the Globe Institute in Copenhagen, who completed the study while at Stockholm University.

“However, current DNA sequencing techniques alone cannot directly provide insights into tissue identity, gene expression dynamics, or transcriptional regulation, as these are encoded in the RNA fraction.”

“Here, we report transcriptional profiles from 10 late Pleistocene woolly mammoths,” the team continued. “One of these, dated to be ∼39,000 years old, yielded sufficient detail to recover…the oldest ancient RNA sequences recorded to date.”

DNA, the double-stranded “blueprint” molecule that stores genetic information, is far sturdier than RNA, which is why it can be traced back for millions of years instead of thousands. Single-stranded RNA, a “messenger” molecule that carries out the orders of DNA, is more fragile and rare in the paleontological record.

In addition to proving that RNA can survive much longer than previously known, the team discovered that Yuka—the mammoth that died 39,000 years ago—has been misgendered for years (yes, I realize gender is a social construct that does not apply to extremely dead mammoths, but mis-sexed just doesn’t have the same ring).

Yuka was originally deemed female according to a 2021 study that observed the “presence of skin folds in the genital area compatible with labia vulvae structures in modern elephants and the absence of male-specific muscle structures.” Mármol Sánchez and his colleagues have now overturned this anatomical judgement by probing the genetic remnants of Yuka’s Y chromosome.

In fact, as I write this on Thursday, November 13—a day before the embargo on this study lifts on Friday—Yuka is still listed as female on Wikipedia.

Just a day until you can live your truth, buddy.

In other news…

Leave it to beavers

Burgher, Jesse A. S. et al. “Beaver-related restoration and freshwater climate resilience across western North America.” Restoration Ecology.

Every era has a champion; in our warming world, eager beavers may rise to claim this lofty title.

These enterprising rodents are textbook “ecosystem engineers” that reshape environments with sturdy dams that create biodiverse havens that are resistant to climate change. To better assess the role of beavers in the climate crisis, researchers reviewed the reported behavioral beaver-related restoration (BRR) projects across North America.

“Climate change is projected to impact streamflow patterns in western North America, reducing aquatic habitat quantity and quality and harming native species, but BRR has the potential to ameliorate some of these impacts,” said researchers led by Jesse A. S. Burgher of Washington State University.

The team reports “substantial evidence that BRR increases climate resiliency…by reducing summer water temperatures, increasing water storage, and enhancing floodplain connectivity” while also creating “fire-resistant habitat patches.”

So go forth and get busy, beavers! May we survive this crisis in part through the skin of your teeth.

One big happy stellar family

Boyle, Andrew W. et al. “Lost Sisters Found: TESS and Gaia Reveal a Dissolving Pleiades Complex.” The Astrophysical Journal.

Visible from both the Northern and Southern Hemispheres, the Pleiades is the most widely recognized and culturally significant star cluster in the night sky. While this asterism is defined by a handful of especially radiant stars, known as the Seven Sisters, scientists have now tracked down thousands of other stellar siblings born from the same clutch scattered across some 2,000 light years.
Wide-field shot of Pleiades. Image Antonio Ferretti & Attilio Bruzzone
“We find that the Pleiades constitutes the bound core of a much larger, coeval structure” and “we refer to this structure as the Greater Pleiades Complex,” said researchers led by Andrew W. Boyle of the University of North Carolina at Chapel Hill. “On the basis of uniform ages, coherent space velocities, detailed elemental abundances, and traceback histories, we conclude that most stars in this complex originated from the same giant molecular cloud.”

The work “further cements the Pleiades as a cornerstone of stellar astrophysics” and adds new allure to a cluster that first exploded into the skies during the Cretaceous age. (For more on the Pleiades, check out this piece I wrote earlier this year about the deep roots of its lore).

Getting inside your head(er)

Zamorano, Francisco et al. “Brain Mechanisms across the Spectrum of Engagement in Football Fans: A Functional Neuroimaging Study.” Radiology.

Scientists have peered into a place I would never dare to visit—the minds of football fans during high-stakes plays. To tap into the neural side of fanaticism, researchers enlisted 60 healthy male fans from the ages of 20 to 45 to witness dozens of goal sequences from matches involving their favorite teams, rival teams, and “neutral” teams while their brains were scanned by an fMRI machine.

The participants were rated according to a “Football Supporters Fanaticism Scale (FSFS)” with criteria like “violent thought and/or action tendencies” and “institutional belonging and/or identification.” The scale divided the group up into 38 casual spectators, 19 committed fans, and four deranged fanatics (adjectives are mine for flourish).
Rendering of the negative effect of significant defeat. Image: Radiological Society of North America (RSNA)
“Our key findings revealed that scoring against rivals activated the reward system…while conceding to rivals triggered the mentalization network and inhibited the dorsal anterior cingulate cortex (dACC)”—a region responsible for cognitive control and decision-making—said researchers led by Francisco Zamorano of the Universidad San Sebastián in Chile. “Higher Football Supporters Fanaticism Scale scores correlated with reduced dACC activation during defeats, suggesting impaired emotional regulation in highly engaged fans.”

In other words, it is now scientifically confirmed that football fanatics are Messi bitches who love drama.

Diplomacy served up fresh

Cabral, Óscar et al “Power for dinner. Culinary diplomacy and geopolitical aspects in Portuguese diplomatic tables (1910-2023).”

We’ll close, as all things should, with a century of fine Portuguese dining. In yet another edition of “yes, this can be a job,” researchers collected 457 menus served at various diplomatic meals in Portugal from 1910 to 2023 to probe “how Portuguese gastronomic culture has been leveraged as a culinary diplomacy and geopolitical rapprochement strategy.”

As a lover of both food and geopolitical bureaucracy, this study really hit the spot. Highlights include a 1957 “regional lunch” for Queen Elizabeth II that aimed to channel “Portugality” through dishes like lobster and fruit tarts from the cities of Peniche and Alcobaça. The study is also filled with amazing asides like “the inclusion of imperial ice cream in the European Free Trade Association official luncheon (ID45, 1960) seems to transmit a sense of geopolitical greatness and vast governing capacity.” Ice cream just tastes so much better when it’s a symbol of international power.
Menu of the “Luncheon in honour of her Majesty Queen Elizabeth II and his Royal Highness the Duke of Edinburgh” held in Alcobaça (Portugal) on February 20th, 1957. Image: Cabral et al., 2025.
The team also unearthed a possible faux pas: Indian president Ramaswamy Venkataraman, a vegetarian who was raised Hindu, was served roast beef in 1990. In a footnote, Cabral and his colleagues concluded that “further investigation is deemed necessary to understand the context of ‘roast beef’ service to the Indian President in 1990.” Talk about juicy gossip!

Thanks for reading! See you next week.

Power for dinner. Culinary diplomacy and geopolitical aspects in Portuguese diplomatic tables (1910-2023)

IntroductionThis paper examines how diplomatic meals in Portugal (1910–2023) have been shaped by Portuguese foreign policy and geopolitical contexts, and con...

^{Óscar Cabral (Frontiers)}