All stories — Page 44

1 Dec 2025

Soybean oil linked to weight gain in mice

A University of California, Riverside study found that a high-fat diet rich in soybean oil made most mice gain weight. Engineered mice with a different liver protein did not gain weight; oxylipins from linoleic acid may be involved.

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1 Dec 2025

Searching for Life on Exoplanets

Since a 1995 discovery, astronomers have found over 4,000 exoplanets. Scientists study biosignatures and technosignatures to learn if life or technology exists elsewhere. A NASA grant supports Adam Frank's work on technosignatures.

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1 Dec 2025

How to choose and care for a real Christmas tree

Many people in the United States buy real Christmas trees. Michigan is the third largest producer and record-high tariffs and other challenges may affect prices; Bill Lindberg offers practical advice on buying and care.

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1 Dec 2025

Oldest RNA found in woolly mammoth from Siberian permafrost

Scientists isolated and sequenced RNA from a woolly mammoth's frozen tissue. The material came from Siberian permafrost and is nearly 40,000 years old; the study shows RNA can survive for very long periods.

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1 Dec 2025

Study: Year‑round RSV Immunization Could Reduce Big Outbreaks

A study in Science Advances finds that offering RSV immunizations year‑round would lower the chance of large seasonal outbreaks in the United States. Researchers compared spread in cities and rural areas and tested seasonal versus year‑round schedules.

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1 Dec 2025

Why top firms hire, train and then let people go

A study in the American Economic Review explains why elite firms hire bright people, train them, and later let many leave. The model shows how reputation, public results and selective turnover help firms and workers.

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1 Dec 2025

Financial worries disrupt sleep in National Guard members

A study of full-time Army and Air National Guard members found that financial stress leads to tense bedtime habits and poorer sleep. Researchers measured stress, bedtime behaviours, and sleep using surveys and wrist actigraphs.

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1 Dec 2025

January 2025 Los Angeles wildfires and the rise in virtual health visits

A study of 3.7 million Kaiser Permanente members found that the January 2025 Los Angeles wildfires caused large increases in virtual care, especially for respiratory and cardiovascular symptoms, and raised other outpatient visits.

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1 Dec 2025

AI coach helps medical students learn suturing

Researchers at Johns Hopkins developed an explainable AI tool that gives immediate text feedback to medical students practicing suturing. A small randomized study found faster learning for students with prior experience; beginners showed less benefit.

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1 Dec 2025

Large stone basin found at Gabii near Rome

Archaeologists at Gabii, east of Rome, uncovered a large stone-lined basin dated to about 250 BCE. The feature may be a monumental pool and is part of wider discoveries; fieldwork will continue next summer.

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29 Nov 2025

Jamaica wins historic bobsled gold while recovering from Hurricane Melissa

Jamaica is recovering from Hurricane Melissa, with deaths, missing people and damage. In Whistler on November 22–23, Jamaica won one gold and two bronze bobsled medals, including a first-ever four-man gold.

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29 Nov 2025

Toxic mine spill in Lubumbashi, DRC

On November 4, 2025 a dam at a mine in Lubumbashi operated by Congo Dongfang Mining collapsed, releasing toxic, acid-laden water. Authorities suspended CDM activities and an investigation was announced on November 22, 2025.

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