Newborn babies cry, but without tearing up. Babies don't have fully formed tear ducts and do not produce tears for about 4-13 weeks.
10 Things You Didn't Know About Tears
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Key Facts In This Video
Every time you blink, tears fall from glands that help you see. 00:23
Crocodiles cry when eating. 01:23
Butterflies feed off the tears of some turtle species. 02:20
Written by Curiosity Staff November 22, 2014
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