Blinking gives your brain a break
Blink. Blink blink blink. Every minute, we blink our eyes 15 to 20 times. But we only need to blink two to four times a minute for adequate lubrication. So what's happening when we blink those other times? (Blink blink blink)
Source: http://video.msnbc.msn.com/hardball/50402501/
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