Most logo changes by big brands are subtle.
Think Coca-Cola — since the 1880s, its logo design has barely evolved. The Coca-Cola logo is ubiquitous and consistent, and it pays off: Coca-Cola is widely regarded as the most recognized brand worldwide.
Some, however, are so drastic that they look as if they've been created for completely different companies. Yahoo!, for one, unveiled a new logo on Monday, scrapping the all-caps design for a lower-case look.
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