sentences:  IMAX was invented more than 40 years ago by Graeme Ferguson, Roman Kroiter, and Robert Kerr who pioneered the technology and debuted it at the EXPO 67 in Montreal, Canada and later again at EXPO 70 in Osaka, Japan.Since then, IMAX and travelogues have latched onto each other.In the 1970s and 1980s, the popularity of traditional travelogues declined.