Steam Heat On December 14, 2015December 14, 2015 By Mike and Christy Heat from that molten iron core making its way to the surface. Burr…it cold out there. Yellowstone , NP. Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Click to email a link to a friend (Opens in new window) Email Click to share on Pinterest (Opens in new window) Pinterest Click to share on Tumblr (Opens in new window) Tumblr More Click to print (Opens in new window) Print Like Loading...