How does your brain tell time?

"Time" is the most popular noun in the English language, yet how would we tell time if we didn’t have access to the plethora of watches, clocks and cell phones at our disposal?

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<p><a href="http://www.physorg.com/news89469897.html">How does your brain tell time?</a></p> <p>"Time" is the most popular noun in the English language, yet how would we tell time if we didn’t have access to the plethora of watches, clocks and cell phones at our disposal?</p>