The polar vortex is an enormous, 3-dimensional ring of winds that surrounds the North and South poles during each hemisphere’s winter. The polar vortex influences the jet stream, which can bring cold winter weather to the U.S. and Europe.

Show your love for birds by joining the 2021 Great Backyard Bird Count. It's free and easy to participate in this 4-day global event. Find out how here.

Satellite images reveal that the once colossal A-68A iceberg has broken into multiple pieces.

Watch giant pandas Mei Xiang and Tian Tian sliding and rolling around in snow in their habitat at Smithsonian's National Zoo in Washington in this video.

Wildfires burned more than 10 million acres in the United States during the 2020 season. It was the worst season on record.

In 20-million-=year-old rock off the coast of Taiwan, researchers have discovered what they think is the fossilized burrow of a giant, predatory sand worm.

The rate at which ice is disappearing across the planet has been speeding up, by 65% since the 1990s, a survey of global ice loss using European Space Agency satellite data reveals.

On Trump’s way out of the White House, his administration demolished a law that protects migratory birds, putting over 1,000 species at risk. The Biden administration can still salvage it, but only if they act swiftly.

A crack on the Antarctic ice shelf grew dramatically in late 2020 into 2021. Scientists are watching to see if the rapidly accelerating crack will cause the shelf to rip apart before Antarctica's sunlit summer season - going on now - comes to an end.

Our Earth and sun were born together, and their fates are tied together. As our star becomes a red giant and billows outward, our planet will become a dry, scorched, uninhabitable rock. This will happen even as our Milky Way galaxy collides with the Andromeda galaxy next door.