Gillian Mandich knows happiness is a science. She's actually well on her way to getting her PhD in Happiness. Yes, it’s real and it’s no laughing matter. In fact, happiness deeply effects your health. If you’re trying to lose weight, or lower cholesterol, actually going out and taking the steps to enjoy yourself might be better than even hitting the gym. And think happiness and sadness are on the same spectrum and mutually exclusive? Guess again.