mood boosters

Get that brolly out! It may feel deeply counter-intuitive - but rainy days could offer a host of health and mood-lifting benefits. Rain improves air quality, literally washing fine particulate pollution away, and rainfall also releases Geosmin, a fragrant compound which is linked with relaxation and increased serotonin levels. What’s more, Professor Michael Terman, from Columbia University in New York, introduces Michael to negative air ions created after rainfall. He is researching how high levels of negative ions could potentially reduce stress, stave off depression and maybe even boost your immune system. Meanwhile, our volunteer Dennis steps outside and embraces the rain.

New episodes will be released on Wednesdays, but if you’re in the UK, listen to new episodes, a week early, first on BBC Sounds: bbc.in/3zqa6BB

Producer: Nija Dalal-Small Science Producer: Catherine Wyler Assistant Producer: Gulnar Mimaroglu Trainee Assistant Producer: Toni Arenyeka Executive Producer:: Zoe Heron A BBC Studios production for BBC Sounds / BBC Radio 4.

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In this episode, Michael speaks to expert Kirsten Berding Harold, University College Cork, for all the latest science on all things good bacteria. Our willing human guinea pig Clare has a go making her own kefir at home and Michael has a go at cultivating some healthy bacteria in the form of sauerkraut - which he claims is far simpler to make at home than you might think!

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The season of rebirth may be one of the most uplifting seasons humans experience, with a sense of renewal and meaning materializing before their eyes in nature. But could it change our perception and behavior. And is there a dark side to spring?

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