The spectacular formations occur when extreme heat and wind conditions combine to form dancing eddies of air. The worst instance on record occurred in Japan in 1923.
Update, June 4, 2014: Because of a copyright claim, we’ve removed the video from this post.
TODAY IN SLATE
Smash and Grab
Will competitive Senate contests in Kansas and South Dakota lead to more late-breaking races in future elections?
Stop Panicking. America Is Now in Very Good Shape to Respond to the Ebola Crisis.
The 2014 Kansas City Royals Show the Value of Building a Mediocre Baseball Team
The GOP Won’t Win Any Black Votes With Its New “Willie Horton” Ad
Sleater-Kinney Was Once America’s Best Rock Band
Can it be again?
Forget Oculus Rift
This $25 cardboard box turns your phone into an incredibly fun virtual reality experience.