Last week, New Zealand’s prime minister Jacinda Ardern announced her resignation, saying that she “no longer had enough in the tank” to do the role justice. Madeleine Finlay speaks to cognitive scientist Prof Laurie Santos about the symptoms of burnout, what causes it and the best ways to recover. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>

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