In our last conversation, we opened up the hood of the artificial intelligence engine to look closely at tokens. We talked about them as the raw materials of this new digital world—the invisible gears and cogs constantly churning in the dark to process language, calculate probabilities, and synthesi
Many grocery shoppers know the routine: bring fruit and vegetables home, rinse them, dry them and hope they stay fresh long enough to be eaten. But fresh produce is delicate. Grapes shrivel, apple slices brown and berries can spoil quickly.
At the same time, many people worry about what may remain on the surface of fruit they buy, including pesticide residues.
Cleaning and freshness are usually treated as separate problems that require different treatments. Washing feels like a simple act of control. But it’s not quite that simple.
Researchers at the University of Rochester showed that one of those biological advantages can be moved into another mammal. By transferring a gene linked to the naked mole rat’s unusually high levels of high molecular weight hyaluronic acid (HMW-HA), the team improved health and modestly extended lifespan in mice.
The work, published in Nature in 2023, suggested that at least some longevity traits that evolved in long-lived animals may be adaptable beyond the species that developed them. The genetically modified mice lived healthier lives and had an approximate 4.4 percent increase in median lifespan compared with ordinary mice.
“Our study provides a proof of principle that unique longevity mechanisms that evolved in long-lived mammalian species can be exported to improve the lifespans of other mammals,” says Vera Gorbunova, the Doris Johns Cherry Professor of biology and medicine at Rochester.
Astronomers have employed the upgraded Giant Metrewave Radio Telescope (uGMRT) and the MeerKAT radio telescope to observe a galaxy cluster known as RXCJ0232–4420. Results of the new observations, published April 29 on the arXiv pre-print server, deliver important insights into the nature of this cluster.
Galaxy clusters contain up to thousands of galaxies bound together by gravity. They generally form as a result of mergers and grow by accreting sub-clusters. Therefore, they could serve as excellent laboratories for studying galaxy evolution and cosmology.
During brain development, neurons can regulate their movement until they reach their final destination thanks to a “molecular switch” involving the protein Teneurin 4 (Ten4). This protein can guide neuronal migration through mutually exclusive molecular pathways and determine the direction of nerve cells.
The discovery, published in the journal Nature Communications, improves our understanding of the molecular mechanisms that control neuronal migration and offers new insights into how the brain develops at the molecular level.
The study combines advanced techniques — structural protein studies, gene editing in animal models and super-resolution microscopy — to broaden our understanding of the origins of neurodevelopmental disorders and psychiatric or neurological conditions —schizophrenia, epilepsy, autism, bipolar disorder, etc. — which may be linked to errors in neuronal migration.
The maternal-fetal interface is a specialized immunological barrier that integrates tolerance, defense, and regulated inflammation throughout gestation. Distinct immune populations mediate implantation, immune homeostasis, and parturition, while dysregulation can result in chronic placental inflammation, a consequence of barrier failure, characterized by infiltration of maternal T cells into placental/fetal tissues.