Why do we cry? The science of tears, The Independent
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Happy, sad, crocodile or from onions, Dr Nick Knight explains the scientific reasons behind sobbing
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Photographs that reveal the true beauty of tears.
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How crying can make you healthier, The Independent
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Teary-Eyed Evolution: Crying Serves A Purpose : NPR
Ateneo Chemistry Society - What is a tear gas? Do gases cry? Are
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