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This week we're talking about connectivity. How to keep the internet running when international data cables are damaged by earthquakes or war. And are light beams a solution ? Also this week: Satellites and AI are being used to count migrating wildebeest in Africa. We hear how tech is challenging long-standing estimates of animal numbers. Presenter: Shiona McCallum Producer: Tom Quinn (Image: A photo of many fibre optic cables emitting bright light against a dark background. Credit: Getty Images)