Our brains sort words as we sleep
Vigilance in slumber may explain how meaningful sounds wake a person
![woman sleeping](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/09/ls_hearingsleeping_feat_free.jpg?fit=860%2C460&ssl=1)
ALWAYS LISTENING Even while sound asleep, people’s brains could still distinguish animal words from object words, a new study finds.
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