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- Why is a minute divided into 60 seconds, an hour into 60 minutes? http://www.scientificamerican.com/article.cfm?id=experts-time-division-days-hours-minutes 148 comments
- Why is a minute divided into 60 seconds, an hour into 60 minutes, yet there are only 24 hours in a day? http://www.scientificamerican.com/article.cfm?id=experts-time-division-days-hours-minutes 14 comments history
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