When the polar jet stream jet dips far south, it can deliver blasts of cold and snow to temperate latitudes.
The New Year has brought freezing-cold weather to much of the United States, setting record lows in the Midwest and East.
Plants long entombed beneath Canadian ice are now emerging. They’re telling a story of warming unprecedented in the history of human civilization.
Weather control is largely fiction for now, although people are unintentionally changing their weather. And that might not be a good thing.