Mike Potts / Fish drying on racks, Varangerfjord, Norway, March 2013.

Petra Wegner / Guinea Pig (Cavia porcellus) golden long haired, in wooden feeding rack, on garden lawn, feeding on grass

Petra Wegner / Guinea Pig (Cavia porcellus) black and white short coated, in wooden feeding rack, on garden lawn, being fed carrot. Model rleased

Michio Hoshino / Caribou (Rangifer tarandus) male with full rack, Alaska

Karine Aigner / White and ginger cat sitting next to shoe rack, Kawaramati Cat Cafe Kyoto, Japan.

Ashley Cooper / The Gornergrat railway above Zermatt Switzerland. June 2004

Ashley Cooper / The Gornergrat railway above Zermatt Switzerland. June 2004

Ashley Cooper / Bikes in bike racks in Amsterdam, Netherlands. A huge percentage of the population cycle in this flat, low lying country. April 2013.

Ashley Cooper / Cyclist on the new CS7 Cycle Superhighway that goes from Southwark bridge to Tooting. London England, UK, October 2010.

Ashley Cooper / Cyclist on the new CS7 Cycle Superhighway that goes from Southwark bridge to Tooting. London England, UK, October 2010.

Pete Oxford / Pearl farming rack, J Hunter Pearl Farm, Savusavu island, Fiji, South Pacific, April 2014. Fiji is known for producing 'black' pearls.

Pat Tuson / Female cyclist unlocking her bicycle from bike rack, Highbury Corner, London Borough of Islington, England UK, August 2008