Never heard of it, SLACK.Luke , ever seen a screw trap? running two this spring for a invasive survey,
something new for me
Have looked up polar vortex though. Early this week, I watched Al Roker with NBC News/ Today Show respond to writers of emails / social media that claim media makes this stuff up. He had a college text/glossary of weather terms first printing 1959 that included polar vortex.
The polar vortex was first described as early as 1853.
This is footnote #5: "Air Maps", Littell's Living Age No. 495, 12 November 1853, p. 430.
this is the page 430 with a highlight half way down the left column: