The Owl · Evening Edition

UC San Francisco researchers built a two-particle system that edits T cells inside the body to carry cancer-targeting receptors. One particle delivers CRISPR gene-editing tools to T cells. The other delivers the new DNA to a precise spot in the genome. In mice with humanized immune systems, a single injection cleared detectable leukemia in nearly all animals within two weeks. The method also worked against multiple myeloma and a solid sarcoma tumor. This is animal work only. Standard CAR-T therapy can take weeks and cost $400,000 to $500,000, so a simpler route could widen access, but human safety and effectiveness are untested. The team has founded a company, Azalea Therapeutics, to pursue clinical development.

Tropical Storm Isaias has formed in the Gulf of Mexico. The National Hurricane Center expects it to reach hurricane strength by Thursday and category 2 by Friday morning. Landfall is likely late Friday or early Saturday somewhere between Louisiana and Florida. Forecasters warn of damaging winds, storm surge, and 3 to 6 inches of rain along the coast, with isolated spots up to 10 inches. Hurricane and Storm Surge Watches are up, and Florida's governor has declared a state of emergency across 25 counties. A strengthening El Niño has kept the season quiet so far, but Isaias found warm water and little wind shear. Forecasts may shift over the coming days.

Flu season usually begins in October or November. This year, flu appears to have started rising in September. Our source here is only a brief summary, so we can't say how large the early increase is or where it is concentrated. We'll add detail as fuller reports come in.

University of Birmingham researchers studied a receptor called P2X7, which helps trigger inflammatory signaling in the brain. They tested lab-grown microglia-like cells, made from human blood cells, and slices of brain tissue removed during neurosurgery. Blocking the receptor with a specific antagonist significantly reduced the inflammatory response. The work appears in the journal Brain. These are laboratory experiments, not patient treatments, so benefits for Alzheimer's, Parkinson's, or brain injury remain unproven. The authors say the next step is clinical trials, particularly for traumatic brain injury, where no effective drugs exist to curb this inflammation. They also hope existing drugs could be repurposed.

Aerial surveys of Zavodovski Island, near Antarctica, found 63% fewer occupied chinstrap penguin nests in 2025 than in 2011. In 2011 the island held an estimated 600,000 chinstraps and 90,000 macaroni penguins. Researchers from the British Antarctic Survey blame warming seas that have pushed krill, the chinstraps' food, southward. Sea ice and a lack of nesting islands keep the birds from following. Macaroni penguins, with a more flexible diet, have increased sharply. The team ruled out volcanic eruptions as the main cause, since the decline has been steady since 2011. The title of largest colony now goes to Cape Adare in the Ross Sea. The study is in Current Biology.

The Nobel Prize in Chemistry goes to Henri Kagan of France and Kenso Soai of Japan. Many molecules come in left- and right-handed mirror forms, yet living things use almost only one form, while lab reactions usually make a 50-50 mix. Kagan's 1986 discovery let chemists make more of one mirror form than had been thought possible. Soai reported a reaction with that potential in 1995, and in 2003 he controlled one that produced only one form. The distinction matters in medicine, since the two forms can act very differently in the body, as the thalidomide tragedy showed. The Nobel Committee says the work has become part of basic chemical understanding.