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Ngày đăng: 05/08/2016

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Plenty of animals have tears that moisturize their eyes. But does that
mean they’re sad? Quick Questions explains! Hosted by: Michael Aranda
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http://boingboing.net/2014/09/15/do-animals-cry.html http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0021236

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