Friday, March 24, 2006

From the Martyzone... Yawn...

This week's favorite from Marty Plotnick's newsletter:

Passing on the Yawn

Why do we yawn when we are tired? And why does it seem to be contagious?

Tiny URL substitution by me. Not exactly a new article, but still I never thought to look up why yawns seem contagious.

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