The Science of Friendship, with Robin Dunbar and Helen Czerski

Robin Dunbar is the world-renowned psychologist and author who famously discovered Dunbar’s number: how our capacity for friendship is limited to around 150 people. In this week's episode he explains why friends matter to us – more than we think. The single most surprising fact to emerge out of the medical literature over the last decade or so has been that the number and quality of the friendships we have has a bigger influence on our happiness, health and even mortality risk than anything else except giving up smoking.

To find out more about his new book Friends click here:

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