Video: Mother of Tucson shooting victim: We must ?demand a plan? to end gun violence

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/50402502/

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