A recent cold appears to be a defense against COVID-19 and a partial explanation for kids’ tendency toward milder coronavirus infections.

Mice treated with the protein, which is found in bacteria, quickly eliminated carbon monoxide from their body in their pee.

In a first, astronomers imaged a baby planet within a gap in the disk of material around a star, confirming predictions about how rings form.

To make horses rideable during domestication, people may have inadvertently targeted a mutation in horses to strengthen their backs and their balance.

Levels of hydrogen sulfide gas soared near a raging section of the Tijuana River in San Diego, exposing residents to potentially harmful air pollution.