Readers reply: why do humans cry when they are sad?, Biology

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Why Are Humans the Only Animals That Cry When They're Sad?

Why do we cry? The science of tears, The Independent

Readers reply: why do humans cry when they are sad?

Why Do We Cry? 6 Practical Explanations

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Why do humans cry when feeling strong emotions from a biological

Simply Stated: Why Do We Cry When We're Sad?

BBC Learning English - 6 Minute English / Why do people like sad

Why do humans cry when feeling strong emotions from a biological

Readers reply: why do humans cry when they are sad?

Our Babies, Ourselves: How Biology and Culture Shape the Way We