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Imagine spending six months of every year living in total shade. That’s what life is like for residents of the Norwegian town of Rjukan, set so low in a valley that they see no direct sunshine at all from October to March.

Marnie Chesterton heads there to hear about an ingenious solution: giant mirrors that beam rays down into the town square, where locals gather to feel the reflected heat.

The man behind the project was motivated by a need for winter sun – but how much difference does it really make to our health and happiness? That’s the question posed by this week’s CrowdScience listener Michael, who has noticed living in the rainy Australian city of Melbourne is taking its toll.

Many pensioners claim sunshine relieves achiness as well as conditions like arthritis but one of the biggest scientific studies found temperature has no real impact on reported pain levels, while factors like air pressure and humidity may play a role.

When it comes to our mood, it seems that spending time outside is more important than feeling the heat. The optimum temperature for wellbeing is around a cool 19 degrees centigrade, while excessive warm weather has been linked to an increase in violence and crime.

You can watch a visualisation of this episode on YouTube: Is the 'sunshine cure' a real thing? - CrowdScience, ´óÏó´«Ã½ World Service podcast - YouTube

Producer: Marijke Peters
Presenter: Marnie Chesterton
Editor: Richard Collings
Production co-ordinator: Jonathan Harris

Contributors:

Dr Anna Beukenhorst, University of Manchester
Professor Oscar Ybarra, University of Illinois
Professor Solomon Hsiang, University of California, Berkeley
Martin Andersen, artist

(Photo: Young woman enjoying sunset. Credit: Muriel De Seze/Getty Images)