The trillions of microbes living on and inside the human body are an important part of who we are, from mediating all of our interactions with the environment to determining our cancer risk and influencing who we fall for. And scientists are only just beginning to decipher the species of bugs we share our lives with, and how they shape us.

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For the first installment of the Science Weekly mini-series, Ian Sample interviews James Kinross, a colorectal surgeon and researcher, about the fascinating realm of our gut microbiome. They discuss the effects of modern lifestyle on our gut and ways to maintain its health.

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Source: theguardian.com