#science / Page 9

Scientists have traced kissing back to early primates, suggesting it began long before humans evolved. Their analysis points to great apes and even Neanderthals sharing forms of kissing millions of years ago. The behavior appears to have persisted .. ...

Skin is a barrier meant to keep small invaders out. Products making their way across it should boost that mission.

Around 1000 markings on a slab of rock that was once a seafloor during the Cretaceous period may have been made by sea turtle flippers and swiftly buried by an earthquake ...

About one in ten perimenopausal or menopausal women masturbate to relieve their symptoms, according to a study that has generated media interest around the world.

Winners of the Nature Conservancy Australia Oceania photo contest, chosen from over 3,500 entries from across Australia, Aotearoa New Zealand, Papua New Guinea and Solomon Islands ...

The breed's long maritime history of water rescue and draft work lives on.

Scientists used CRISPR to boost the efficiency and digestibility of a fungus already known for its meatlike qualities. The modified strain grows protein far more quickly and with much less sugar while producing substantially fewer emissions. It also ...

Tiny ingestible spheres filled with engineered bacteria can detect intestinal bleeding by glowing when they encounter heme. Early tests in mice suggest they could become a quick, noninvasive way to monitor gut disease.

Solve the math puzzle from our December 2025 issue, in which a holiday gift exchange occurs.

Simple chemistry could give the reindeer his famously bright snout. But physics would make it look different colors from the ground.