Just off the east coast off Spain lies this collection of holes in the Mediterranean. They’re used to drain the Atlantic, which allows for regular cleaning of the sea-bed. Honestly. OK, so I have absolutely no idea what they are. Do you? Update: Well, not so much of an update, more of a summary. Our ever witty readers reckon this might be: Aliens, a conspiracy, genetically modified barnacles, fishnet stockings, suckers on the arm of a giant squid, a ketchup bottle farm, tuna cages, a huge lego brick, or perhaps even a giant-sized game of Battleships! And yet somehow we [...]