In this episode, we talk about Gelisols, which are permafrost-affected soils of arctic and subarctic regions and are one of the most interesting, but least understood soil orders. The name Gelisol is derived from the Latin word for freeze. But Gelisols are far from static. They are dynamic soils that respond to  physical, chemical and biological processes that take place in cold environments and are at the forefront of global change. Our guests Dr. Alexander (Sasha) Kholodov (University of Alaska-Fairbanks) and Mark Clark (retired state soil scientist for Alaska) bring us some perspective on what makes these soils so dynamic and unique.