Thomas Lazar / Two Coyotes {Canis latrans} fighting on frozen pond, Kettle River, Minnesota, USA, winter

Thomas Lazar / American mink, wet after swimming {Mustela vison} Kettle river, Minnesota, USA

Thomas Lazar / Beaver {Castor canadensis} next to felled tree, Kettle River, Minnesota, USA captive

Yva Momatiuk & John Eastcott / Glacial kettle pond with Alaska Range and Mount McKinley in distance, Denali National Park and Preserve, Alaska

Yva Momatiuk & John Eastcott / American Beaver (Castor canadensis) young animal munching on alder branches in glacial kettle pond, Denali National Park and Preserve, Alaska

Yva Momatiuk & John Eastcott / Alaska Moose (Alces alces gigas) bull with water dripping from antlers after feeding in glacial kettle pond, Denali National Park and Preserve, Alaska

Yva Momatiuk & John Eastcott / Alaska Moose (Alces alces gigas) bull submerges head and antlers while feeding on bottom of glacial kettle pond, Denali National Park and Preserve, Alaska

Graham Eaton / Glacial Sand and Gravel deposited within a kettle hole, Baumaris, Anglesey, Wales, UK, June. Sediment is deposited around a block of ice left near the front of a melting or retreating glacier. When t...

Enrique Lopez-Tapia / Kettle and strainer to make Ethiopian coffee, Danakil depression, Afar Region, Ethiopia, Africa. November 2014.

Jeff Foott / Sign with tea kettles, Tea Kettle Junction, Death Valley National Park, California

Jeff Foott / Sign with tea kettles, Tea Kettle Junction, Death Valley National Park, California

Will Watson / Electro-fishing a glacial kettle hole pond, Kenchester, Herefordshire, England, March.