Science City, Kolkata is the largest science centre in the Indian subcontinent under National Council of Science Museums (NCSM), Ministry of Culture, Government of India, is at the crossing of Eastern Metropolitan Bypass and J B S Haldane avenue, Kolkata. It is considered by some people as the most distinguished landmark in post-independence Kolkata. Saroj Ghose, the first director general of NCSM, who is credited with having conceptualised this centre in 1997. This centre was inaugurated by two parts: the ‘Convention Centre Complex’ was unveiled on 21 December 1996 by Paul Jozef Crutzen in presence of the then chief minister Jyoti Basu and the whole centre was opened by the then prime minister Inder Kumar Gujral on 1 July 1997. On 10 January 2010, prime minister of India, Manmohan Singh laid the foundation stone for the second phase of Science City in presence of the then chief minister of West Bengal, Buddhadeb Bhattacharjee.GalleriesDynamotion HallHands-on and interactive exhibits on various topics of science encouraging visitors to experience with props and enjoy the underlying scientific principles. Illusions. A permanent exhibition on the world of illusions with interactive exhibits, explores how motion and placement make a different in the visual perception. Powers of Ten. 43 exhibits unfold the smallest or the biggest of the universe through zooming in or out in the order of ten. Fresh Water Aquarium. Variety of fresh water fishes in 26 tanks; provide the bio-diversity of the fish species. Live Butterfly Enclave. A colony of live butterflies hatched here and screening of a film Rang Bahari Prajapati on life cycle of butterfly. Science On a Sphere. The spherical projection system created by NOAA. Each show of 30 minutes duration for around 70 people at a time.