Opinions expressed by Entrepreneur contributors are their own. Startups are synonymous with innovation. In this fiercely competitive market, they must constantly come up with innovative ideas. However ...

AMES, Iowa — Do you feel blue? If so, try saying nice things to people. Not only can your kind words cheer others up, you may also feel better. "People walk around being so anxious a lot of the time.

Seven years ago, researchers at Stanford University started an ambitious experiment: They began growing miniature, simplified versions of the human brain from stem cells inside a lab, then later ...