The polar vortex is Earth's frozen guardian—but that guardian is starting to fail. This video dives into the science behind ...

In the atmospheric layer above it, about 10 to 30 miles up, is the stratospheric polar vortex, where every winter a sunlight-starved Arctic spins up a mass of cold air that, ultimately, dissipates ...

As a persistent “heat dome” fuels extreme temperatures for millions, UVA professor Robert Davis explains what’s typical this ...