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An interesting article that talks about scientific studies that prove there are many physical, emotional, and mental health benefits associated with kindness. 
Kindness change the brain. The good feelings that arise when being kind generates endorphins and it also increases serotonin levels and the chemical affects learning, memory, mood, sleep, digestion and health…As an asset, a kind behavior encourages a more kind behavior which makes kindness a key tool against bullying and as result it also contributes to create warm and inclusive school enviroments.
You can read the complete article on this link
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