A spacecraft has captured detailed images of Mercury's north pole, shedding new light on the mysterious side of the planet.

A major, disruptive winter storm was sweeping across the central U.S. and headed toward the mid-Atlantic on Sunday, forecasters said, bringing with it a dreaded combination of snow, ice and plunging t

WICHITA, Kan. (KWCH) - Arctic air returns this weekend, and it will bring some of the coldest temperatures we’ve seen so far this winter. Feels-like temperatures on Thursday morning are in the teens and 20s throughout the state. But the worst is yet to come.

Sleet, snow and freezing rain are expected across several states in the south, leading to school cancellations and flight delays.

An area stretching from Texas to Tennessee is bracing for the expected arrival of freezing rain and snow, as some other parts of the country that already received an arctic

The polar vortex that dipped south over the weekend kept much of the country east of the Rockies in its frigid grip Monday, making many roads treacherous, forcing school closures, and causing widespread power outages and flight cancellations.

The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes escapes and plunges southward into the U.S., Europe and Asia. Studies show a fast-warming Arctic is partly to blame for the increasing frequency of the polar vortex extending its icy grip.

People in the U.S., Europe and Asia experience the polar vortex intense cold when it escapes the North Pole and plunges southward.

Dozens of US states will endure the lowest temperatures they have felt in years next week as a polar vortex brings 'life-threatening' cold. Here's how you can stay safe in these harsh conditions.

People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, a meteorologist says. That includes Kansas City, which is set to host a Chiefs playoffs game this weekend.

The temperature at kickoff Saturday is expected to be in the low to mid-20s, but northerly winds could make it feel much colder. After facing the coldest game in Arrowhead history last year, fans, players and medical personnel are more than ready.

According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need to know.