As more Covid-19 cases appear in the United States and around the world, the need for fast, easy-to-use diagnostic tests is becoming ever more pressing.

Adult Pacific salmon spend a great portion of their life in the ocean.

The Canberra Deep Space Communications Complex plays a key role in keeping engineers and scientists connected to distant spacecraft.

Soot from firestorms would reduce faraway crop production for years.

Where tectonic plates meet, a change in angle.

The Falkland Islands are at risk from tsunamis caused by underwater landslides, according to new research.

New data from the Copernicus Sentinel-5P satellite reveal the decline of air pollution, specifically nitrogen dioxide emissions, over Italy.

Scientists aim to better understand the effects of carbonaceous aerosol on air pollution and climate change.

A majestic ponderosa pine, standing tall in what is widely thought to have been the "center of the world" for the Ancestral Puebloan people, may have more mundane origins than previously believed, according to research led by tree-ring experts at the University of Arizona.

Permafrost soils in the Arctic are thawing. As they do, large additional quantities of greenhouse gases could be released, accelerating climate change.