guardian:

The north and the south pole are haunting and awe-inspiring in equal measure – the icebergs bathe in blues of all hues, constantly sculpted by fierce winds. Polar bears stalk the ice sheets, and underneath, ancient creatures, some still undiscovered, swim in deep dark waters.

Dave Walsh’s photographs show what it is like to be truly on the edge. The images taken during Greenpeace expeditions to the Arctic and Antarctica, between 2007 and 2010, question our romantic relationship with remote, harsh and pristine environments of the polar regions. See the full gallery here

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