When was the last time you laughed? I mean really laughed: a solid, hearty, belly-jiggling laugh. Chances are, many of us have a hard time remembering. That’s because as adults, we have a lot of ...

For thousands of years, versions of the saying “laughter is the best medicine” have emerged in religious, scientific and popular literature—and for good reason. Laughter helps our neurological, ...

Nitrous oxide, commonly known as laughing gas or happy gas, is a colorless, non-flammable gas, with a sweetish odor. It's used in medical and dental procedures as a sedative, relieving anxiety and ...