Thermophiles, Yellowstone National Park
Sigma DP2s, ISO 50, f/14, 1.3 sec.
What you see in the photo is not the result of a science fair experiment.
It's one of the reasons our family loves Yellowstone, and it's part of why we are spending the holiday weekend here instead of going to a KOA.
This particular formation is spooky because it changes every time we see it - it has personality.