Great Canadian Flag Debate a blue background. Pearson preferred this choice, as the blue bars reflected Canada's motto, "From Sea to Sea". On June 15, 1964, Pearson opened the parliamentary flag debate with a resolution: Pearson sought to produce a flag which embodied history and tradition, but he also wanted to excise the Union Jack as a reminder of Canada's heritage and links to the United Kingdom. Hence, the issue was not whether the maple leaf was pre-eminently Canadian, but rather whether the nation should exclude the British-related component from its identity. Diefenbaker led the opposition to the Maple Leaf flag, arguing for the
Great Debate (astronomy) Great Debate (astronomy) The Great Debate, also called the Shapley–Curtis Debate, was held on 26 April 1920 at the Smithsonian Museum of Natural History, between the astronomers Harlow Shapley and Heber Curtis. It concerned the nature of so-called spiral nebulae and the size of the universe; Shapley believed that distant nebulae were relatively small and lay within the outskirts of Earth's home galaxy, while Curtis held that they were in fact independent galaxies, implying that they were exceedingly large and distant. The two scientists first presented independent technical papers about "The Scale of the Universe" during the day and then