A movie projector with IMAX cinema projection standard which was invented by Canadian in 1968 is displayed during the "Made in Canada" exhibition held at Science World in Vancouver, Canada, May 16, 2017. The "Made in Canada" exhibition is a science invention exhibition that allows the visitors to learn about some famous and not-so-famous, but super neat Canadian inventions in 19th and 20th centuries, and also showcases the country's latest innovations to public. (Xinhua/Liang Sen)