With over 350 million people affected by depression worldwide, it’s no doubt an incredibly real and serious issue. But, what exactly is going on inside of a depressed person? Is there a biological basis for these intense feelings of sadness?

With over 350 million people affected by depression worldwide, it’s no doubt an incredibly real and serious issue. But, what exactly is going on inside of a depressed person? Is there a biological basis for these intense feelings of sadness?