04/06/2012 09:28 am ET Updated Jun 06, 2012

How Do We Fall Asleep?

Falling asleep is a routine yet mystifying process. Like trying to see the 3D image in a Magic Eye poster, the more you focus on it, the less likely it is to happen. It shies away from scrutiny and is best approached with an air of detached disinterest; so, though most of us fall asleep every night, we can't say exactly how we do it.

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