Austrian anesthesiologist Peter Nagele was recently recognized for his success in a small, pilot study in which laughing gas was given to patients with treatment-resistant depression. Amongst the 20 patients with clinical depression that had not been helped by former procedures, the researchers found that two-thirds experienced an improvement in symptoms after receiving nitrous oxide, with limited side effects. Nagele's team plans to recreate the same results with a larger test group. Such results suggest that the gas may be a possible treatment for depression in the future. For more information.