Down in the dumps? Fretting about the state of the economy? Fed up with life in general? No kindred spirit to share a rant with? Unhappiness, depression or loneliness could age you faster than smoking or even some diseases. That is the claim by researchers at Stanford University and the Chinese University of Hong Kong. They have created a digital model of ageing that reveals the impact of psychological health. “Your body and soul are connected”, said Fedor Galkin, co-author of the study – and lead scientist at Hong Kong startup Deep Longevity.

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