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• 09:05 Popular

  Nomenclature - Crash Course Chemistry #44

  1,362 views / 0 likes - added 9 years ago

  You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

• 03:49 Popular

  How zip codes helped organize America

  822 views / 0 likes - added 7 years ago

  Zip codes, explained. Subscribe to our channel! http://goo.gl/0bsAjO Zip codes were invented in 1963 to help the United States Postal Service deal with huge increases in mail volume. The Zone Improvement Plan, or “ZIP” code system of addressin

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