Forecasters are warning of treacherous holiday travel and life-threatening cold for much of the nation as an arctic air mass blows into the already-frigid southern United States.

The crew of the International Space Station on Sunday was inspecting an attached Russian space capsule that may have been damaged by a micrometeorite, while ground controllers considered whether to send up a replacement spaceship to ferry some of them home.

EU member states and parliamentarians on Sunday announced an agreement for a major reform to the bloc's carbon market, the central plank of its ambitions to reduce emissions and invest in climate-friendly technologies.

A UN nature deal proposed Sunday calls to protect at least 30 percent of the planet by 2030 and asks rich countries to stump up $30 billion in yearly aid for developing nations to save their ecosystems.

Spooked by a historic drought, local authorities in China have renewed controversial plans to dam the country's biggest freshwater lake.

The sound of a dust devil on Mars was recorded for the first time as the eye of the whirlwind swept over the top of NASA's Perseverance rover, a new study said Tuesday.