All stories — Page 39

9 Dec 2025

Study: Secondhand Clothes May Not Cut New Buying

A study of US shoppers finds buying secondhand clothes often adds to, rather than replaces, purchases of new garments. Younger and frequent shoppers showed the strongest link between resale and new clothing spending.

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9 Dec 2025

Heat and Young Children’s Development

New research links high temperatures to slower early childhood development. The study compared child development records with local monthly temperatures and found higher heat is associated with lower literacy and numeracy milestone attainment.

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9 Dec 2025

Save energy and money with holiday lights

Many people put up holiday lights, and the choice of lights affects winter electricity bills. Expert Scott Dunning explains how LEDs, solar lights and timers can lower energy use and costs.

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8 Dec 2025

Tool that Reorders X Feed Reduces Partisan Rancor

Researchers built a browser extension that scans an X feed for antidemocratic and partisan posts and reorders them without removing content or platform cooperation. Tests during the 2024 election showed small but measurable improvements in attitudes toward the other party.

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8 Dec 2025

AI expands sexual and reproductive health access in Latin America

Research groups in Peru and Argentina use AI tools to give sexual and reproductive health information to young and marginalised people. Experts praise potential but warn of bias and call for better data, rules and oversight.

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8 Dec 2025

T cells in tonsils differ from T cells in blood

A study found that T cells in the tonsils are different from T cells in blood. Researchers say doctors and scientists should study tissue T cells as well as blood to understand vaccines and immunotherapies.

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8 Dec 2025

After-work invitations can help some employees but harm others

New research shows after-work invitations often make socially confident employees feel connected, while shy workers can feel pressure and anxiety. Authors advise people to know their limits and for coworkers to think before inviting.

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8 Dec 2025

Coho salmon DNA detected in air at Issaquah Creek

Last fall researchers collected Coho salmon DNA from the air beside Issaquah Creek, near a salmon hatchery in Washington. They combined air and water eDNA with hatchery counts to track the salmon migration.

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8 Dec 2025

ETH Zurich makes nano-scale OLED pixels

Researchers at ETH Zurich created organic light-emitting diodes (OLEDs) at the nanoscale, with pixels down to about 100 nanometres. The team showed a logo of 2,800 nano-OLEDs and reports large gains in pixel density and new applications.

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8 Dec 2025

AI expands sexual and reproductive health information in Peru and Argentina

Health groups in Peru and Argentina use artificial intelligence to give sexual and reproductive health information to young and marginalised people. Projects include a Quechua chatbot and a WhatsApp platform, but experts warn of bias and access problems.

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8 Dec 2025

New isotope evidence on the Moon’s origin

A new study finds that the object that hit early Earth and formed the Moon—called Theia—likely formed closer to the Sun. Researchers used isotopes from Earth rocks, Apollo samples and meteorites to reach this conclusion.

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8 Dec 2025

Pterosaurs and the fast rise of flight

New research used CT scans to study pterosaur brain cavities and found vision-related brain changes. Scientists say pterosaurs likely evolved powered flight quickly when the group first appeared, unlike birds.

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