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Thnx4 is an initiative of UC Berkeley's Greater Good Science Center, which studies the psychology, sociology, and neuroscience of well-being, and teaches skills that foster a thriving, resilient, and compassionate society.

More and more studies show that gratitude makes you happier and healthier, and hearing "thank you" improves the lives of others. Thnx4 is a sharable gratitude journal—and it's a scientific tool for understanding what happens when people say "thank you."

If you take the 14-day gratitude challenge at Thnx4.org, you'll master the skills to practice and spread gratitude. Along the way you'll be able to say "thnx!" directly to the people in your life.

If you complete the gratitude challenge, you'll be able read your own entries and those of others in your community—and you'll learn how saying “thnx!” changed your life.

You'll also help expand the scientific understanding of gratitude and add to the growing body of research on its physical and psychological benefits.

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