A video of an Irish waterfall that has helped individuals coping with insomnia is part of a new clinical trial for ICU patients, as reported by BBC News.
Beneath a wooden footbridge on the River Bonet in County Leitrim, a small waterfall makes a noisy sound.
It rushes along, cascading down rocks, breaking the wild silence of the rural countryside.
It is a scene featured in a YouTube video that is now helping millions of insomnia sufferers, from Belfast to Beijing, who are struggling to sleep.
The eight-hour footage has been viewed over six million times and is now part of medical research used in several London hospitals as part of a clinical trial.