Scientists have finally cracked the mystery of solar rain, a phenomenon where plasma clumps fall back to the Sun's surface.

The world is very worried about coronavirus variants. As the virus mutates — which all viruses do — variant strains emerge. Some of these variants are more effective at infecting humans and may even ...

An outbreak of new coronavirus in China has sickened more than 800 people and killed at least 26, while spreading to countries around the world. An outbreak of new coronavirus in China has sickened ...

The SARS-CoV-2 coronavirus seems to be suddenly acquiring mutations at a rapid rate. The most worrying variants, first discovered in South Africa and Brazil, increase the virus’s contagiousness and ...

Variants of the coronavirus that were first detected in the U.K., Brazil and South Africa have spread to dozens of countries, and scientists are working to determine what makes them behave differently ...