These areas of the brain, while little known to most people, are helping scientists explain the physiological reasons behind why we feel what we feel when we fall in love.

这些为大多数人不知的脑部区域，正帮助科学家揭解释当我们坠入爱河是为什么会有那种感受的生理原因。

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And yet we can fall asleep while driving a car.

但我们却不能在开车时睡觉。

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But needless to say we didn't want to fall asleep if a bear was making it's way up to our sleeping bags while we slept.

不用说，如果我们睡觉的时候有只熊正向我们的睡袋走来，我们是绝不会睡觉的。

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And while we sometimes fall down on the job, we bring to the political arena a certain battle-hardened skepticism.

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But it sure can dish up some compensating amusement while we wait for the roof to fall in.

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"While we are striving for perfection in the way we deliver care, we know we fall short of that mark -- but patients can help us get better, " says Nancy Foster, AHA's vice president for quality and patient safety policy.

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