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Here are three of the the six entries shortlisted for the Halley VI competition to design a scientific research station at one of the Earth’s most extreme environments. Located 10,000 miles from the UK on a 150 m thick floating ice shelf, the complex must be self-sufficient, able to withstand temperatures of –30°C and have minimal impact on Antarctica’s environment. Pictured here (clockwise from top left) are the designs by Make, Richard Rogers Partnership and Hopkins Architects. build. The competition is being run by the RIBA and the British Antarctic Survey.