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Lowell Heddings, better known online as the How-To Geek, spends all his free time bringing you fresh geekery on a daily basis. You can follow him on Google+ if you'd like.
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The five interlocked rings that serve as the symbol of the Olympic Games represent the union of the “five continents” of the world (with no continent being represented by any specific ring).
Before 1951 though, each ring color corresponded to a particular continent: blue for Europe, yellow for Asia, black for Africa, green for Australia and Oceania, and red for the Americas.
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