This aerial image shows two researchers exploring a sunken spring in the middle of a gray and white icy landscape. One researcher, dressed in blue, crouches inside a circular hole in the ice while a second researcher, dressed in black, stands to the left taking a photo.
Astrobiologists Gordon Osinski of the University of Western Ontario and Mark Fox-Powell of the Open University in the United Kingdom explore Lost Hammer spring on Axel Heiberg Island in the Canadian Arctic. Credit: Mark Fox-Powell

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