Laughing gas or nitrous oxide could be used as a treatment for severe depression in patients whose symptoms don't respond to normal therapies.
Nitrous oxide - best known as laughing gas - has been one of the world`s oldest and most widely used anaesthetics.
It`s no laughing matter! Nitrous oxide commonly known as laughing gas may have brought the last great Ice Age to an end, a new research has found.
Day in Pics: 20th December
Showbiz World - December 20, 2014
People Magazine Awards 2014