We tend to think of sleep as the time when our brains shut down for good, but in fact, what's around us, particularly sound, has great influence on how well we sleep. From the gentle patter of rain to ...

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In space, no one can hear you scream. You may have heard this saying. It’s the tagline from the famous 1979 science fiction movie “Alien.” It’s a scary thought, but is it true? The simple answer is ...