· 1964 The government of Ontario commissions Toronto architect Raymond Moriyama to design the Science Centre as a Centennial project.

· 1966 Construction begins on a complex of three buildings connected by glassed-in walkways and escalators, tumbling over the ridge of the Don
Valley, 27 metres below.

· 1969 Premier John Robarts officially opens the Ontario Science Centre on September 27.

· 1973 The Science Centre initiates its international Outreach programs - including Science Circus, Seeing Brain, Bodyworks and Optickles.

· 1974 FirstWorldCraftsExhibition"lnPraiseofHands" features artisans from 50 countries.

· 1976 More than 200 Native people from the Arctic to the Maritimes demonstrate their music, arts and technology at "The Native Heritage" exhibition.

· 1977 Theexhibition "Deceptions in Art, Nature, and Play" reveals to visitors how they perceive and how the eyes can deceive.

· 1979 "The Wood Show' displays the many fascinating facets ofoneof Ontario's top industries.

· 1982 Theexhibition "China: 7000Years of Discovery" breaks all attendance records, attracting more than 1.15 million visitors from around the world.
The Centre opens a Science School for Ontario students.

· 1984 The Science Centre welcomes its 20 millionth visitor and introduces "Scienceworks", the first of its five best-selling hands-on books published by Kids Can Press.

· 1986 The "Food" show becomes one of the Centre's biggest draws.

· 1988 The "Sport" show is the Centre's first bilingual exhibition. A copy is currently touring the U.S.

· 1990 The JASON Project starts its annual two-way, live TV link between the Centre and science research projects around the world.

· 1991 The"Mindworks" exhibitinnopens, a collaboratinn with the American Psychological Association. A copy is currently touring the U.S.

· 1992 The Challenger Learning Centre is created, an innovative space station and mission control facility for students.

· 1993 "The Living Earth" opens, an exhibition exploring the natural environment and the challenges of preserving it.

· 1995 "The Information Highway" links visitors with the latest communications technology and "Human Body" unravels the secrets inside us.

· 1996 "A Question of Truth" opens, challenging points of view about science, race and prejudice.

· 1996 Shoppers Drug Mart® OMNIMAX® Theatre opens, the first of its kind in Ontario.

· 1997 The Centre completes renewal of over 50 % of its exhibits in five years

· 1997 OMNIMAX Theatre welcomes 500,000 visitor in December, joining the ranks of the ten most successful domed theatres in the world.

· 1998 Tourism Toronto's 1997 figures show Centre's attendance growth makes it the fastest growing tourist attraction in the GTA.

· 1998 Centre finishes its fiscal year with 1,010,000 visitors.

· 1999 The millennium exhibition, Timescape,. Unearthing the Mysteries of Time, takes visitors into a gigantic time warp; back to the beginnings of the Earth and forward into the new millennium.

· 2000 For the third year in a row, Centre's attendance exceeds the million mark