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Life teems under the Antarctic ice sheet. In subglacial Lake Mercer, it is surprisingly versatile and isolated from the rest of the world.

Cuban brown anoles have the highest blood lead levels of any vertebrate known -- three times that of the previous record holder, the Nile crocodile.

On Mars, the Perseverance rover found a spotted rock that could bear signs of ancient life. On Earth, a researcher used a lookalike for a dry run.

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.

Hurricane forecasts have improved since Katrina, but risks from climate change and budget cuts loom.

Scientists report that targeting sugars on virus surfaces stopped multiple infections, though the approach needs much refinement before human trials.