At first I thought "wow, they're so smooth" but then realized that the dynamics must be so incredibly fast that the fuzzy smoothness is really just motion blur. Amazing though....
The article said that they form as ionized balls that can move at ten percent of the speed of light. That's almost 30 million miles an hour! I don't know what to say, except that nature is f'ing amazing!
And I'd love to know what those downward branching structures are...
When clicking on the link to try to view the high resolution image, first I got dogs (which was humorous, I'll admit), but the second time I was taken to Facebook which of course just has highly compressed jpegs... why are they making it so difficult
The image itself links to the full resolution. But this is high-resolution compared to other photos of sprites, not high-resolution compared to photos in general.