The uptick in measles cases has left many people wondering about early signs of measles, whether they need an updated vaccine and treatment options.

A clinical trial found that spending about 10 minutes with a therapy dog reduced patients’ anxiety in a pediatric emergency room.

Videos show narwhals using their tusks in several ways, including prodding and flipping a fish. It’s the first reported evidence of the whales playing.

The privately-owned lander turned its cameras toward Earth as our planet cast its shadow over the moon. It’s not the first spacecraft to do so.

The puppets, unearthed in El Salvador, have movable heads, strange facial expressions and may have been dressed for ritual roles.

During the age of dinosaurs, early mammals probably lacked the stripes and spots of their modern relatives, having uniformly dark, drab coats.

A quantum processor solved a problem in 20 minutes that would take a supercomputer millions of years. A supercomputer then did a part of it in about 2 hours.

Earth’s core could contain helium from the early solar system. The noble gas tucks into gaps in iron crystals under high pressure and temperature.

Face bones unearthed in a cave suggest that members of our genus, Homo, reached northern Spain as early as 1.4 million years ago.

An abundance of data show that SSRIs, a class of drugs commonly used as antidepressants, are effective, though, like any drug, they have risks.

AI models are growing ever-more capable, accurate and impressive. The question of if they represent “general intelligence” is increasingly moot.

We’ve learned a lot about COVID-19 over the last five years, but big questions remain. Recent federal actions may hinder the disease’s management.