The sculpture is described as 14.0 feet (4.3m) in height and 8 feet (2.4m) in diameter by the Smithsonian Institution and it sits atop a base that is 1.5 feet (0.46m) in height and 10 feet (3.0m) in diameter. However, the University of Chicago says it is only 12 feet (3.7m) in height. The Henry Moore Foundation lists its height at 3.66m. The sculpture reminds some of the human skull, while it reminds others of an atomic mushroom cloud.
Energy World was a demonstration project of 51 low-energy houses constructed in the Shenley Lodge area of Milton Keynes, United Kingdom. The project was promoted by the Milton Keynes Development Corporation and culminated in a public exhibition in August and October 1986 that attracted international interest. It was a significant landmark in the design and construction of low-energy housing, and in the development of energy efficiency evaluation tools. It has had a long-term impact on Government policy and within the national house-building industry, insofar as the progressive 'tightening up' of the energy section of the Building Regulations has largely been founded on this pioneering work.