Central and Peripheral Mechanisms of Colour Vision: Proceedings of an International Symposium Held at The Wenner-Gren Center Stockholm, June 14–15, 1984

Laugh and cry. Having a good sob is reputed to be good for you. So is laughter, which has been shown to help heal bodies, as well as broken hearts. Studies in Japan indicate that laughter boosts the immune system and helps the body shake off allergic reactions.