Update on A Newly Exposed Trackway Along the Bright Angel Trail in Grand Canyon

Artists rendition of how the new trackway was created (Figure 8 in the paper). Art by Emily Waldman.

I have posted a second addendum to my original post from December 11, 2016. A new paper describes this trackway in detail! See the addendum here.

CNN also picked up the story here.

Jellyfish Sprite Captured by Camera in Texas

 McDonald Observatory

On rare summer nights, ethereal forms leap into the skies above distant thunderstorms. Alien invaders? Not quite: it's a jellyfish sprite, an extremely brief and rarely captured event associated with incredibly powerful lightning strikes. This event lasted less than 1/30th of a second and occurred above a powerful storm about 100 miles away as seen from McDonald Observatory on July 2nd, 2020. 

Image Credit: Stephen Hummel