When it rains in New York, the whole country gets grumpy.
For about 1.23 billion people on this planet, Facebook is there, in sickness and in health, in good times and in bad, in joy as well as in sorrow. But venting to Facebook creates a significant emotional ripple effect: In the social network, keeping your feelings to yourself is not an option, and curiously, positive vibes are more contagious than negative ones, according to a new study.