Depression....

....it really is in your head.

No kidding. In studies done in a mouse model of depression, a scar is seen on the brain.

First of all, I know they've developed mouse models for all kinds of diseases, but to create depression must have been difficult. It's not like you can interview these guys and find out what they're feeling.

It's somewhat comforting to know that on my "blue" days when I feel like I did when I was depressed, it's probably because of some lasting mark on my brain. These days I have something to look forward to, and that helps.