If I had to define a major depression in a single sentence, I would describe it as a "genetic/neurochemical disorder requiring a strong environmental trigger whose characteristic manifestation is an inability to appreciate sunsets.

Oxytocin is a Teflon hormone - bad news rolls off it.

Importantly, rather than promoting aggression, testosterone promotes whatever is needed to maintain status when challenged.

What happened in the milliseconds before a behavior to cause it? That's in the neurobiological realm.

Individual differences in testosterone level predict very little about differences in aggression.

Perhaps most excitingly, we are uncovering the brain basis of our behaviors - normal, abnormal and in-between. We are mapping a neurobiology of what makes us us.

I love science, and it pains me to think that so many are terrified of the subject or feel that choosing science means you cannot also choose compassion, or the arts, or be awed by nature. Science is not meant to cure us of mystery, but to reinvent and reinvigorate it.