I Made a Never Ending Forest Fire

How big does a planet need to be, so that a forest fire traveling around the surface never ends? Great question from @mattparker2 to @SteveMould on a podcast of unnecessary detail! But I wasn't too happy the answer... So I couldn't help myself and dug a little deeper!

If you want to play with this simulation yourself, here is the terrible JavaScript code: https://codepen.io/program-sam/pen/RwOqXop

A Podcast of Unnecessary detail: https://festivalofthespokennerd.com/podcast/ Steve's video: https://www.youtube.com/watch?v=SqhXQUzVMlQ ... https://www.youtube.com/watch?v=5EV532Ao-xs