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

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.

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

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

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.

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.

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

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.

Uranus radiates more energy than it gets from the sun, two new studies find — just as Jupiter, Saturn and Neptune do.