Markus Varesvuo / Great spotted Woodpecker (Dendrocopus major) with pine / fir cone jammed into tree trunk so it can extract seeds more easily, Finland
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Will Burrard-Lucas / Four by four stuck in muddy bog, Bale Mountains National Park, Ethiopia, November 2011.
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Kirkendall-Spring / Black and white photograph of three rocks with one jammed between the other two, Washington, USA.
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Gary Braasch / Huge crowd of demonstrators from affected shoreline communities marching along 59th Street during the People's Climate March which jammed 6th Avenue and 42nd street through Times Square, New York City...