At 91-years-old, Jane Goodall hasn't just seen a lot of change in the world – she's made a lot of change. The legendary naturalist’s field work with chimpanzees transformed how both science and the general public view our fellow primates. In later years, as an activist and conservationist, she’s inspired countless young people to follow her lead and change the world. Today, when political leaders seem to be prioritizing the economy over the environment, Goodall speaks with Piya Chattopadhyay about how to stay hopeful, and to keep on sparking positive change.

Host Piya Chattopadhyay speaks with The Economist’s Rob Russo and The Globe and Mail’s Shannon Proudfoot about Prime Minister Mark Carney's priorities heading into fall, mathematician and educator Eugenia Cheng explains how math can help us better understand the world, legendary activist and conservationist Jane Goodall shares how to stay hopeful amid climate and political instability, and Canadian hip hop icon Shad and Toronto listener Clare Hodge kick off an all-new season of our monthly challenge That's Puzzling!

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In many ways, personal devices like smartphones, tablets and smartwatches feel less like tools… and more like constant companions. Stephen Monteiro says that’s by design. The assistant professor of communications studies at Concordia University joins David Common to discuss his book Needy Media, in which he breaks down how our devices evolved – from the way they feel in our hands, to how they light up when we look at them – to make us more dependent on them.