Water scarcity is growing even in parts of the world that used to be drought-free. Since most countries waste vast quantities of water, charging for it would help. Our correspondent travelled to America’s northern border to report on illegal crossings from Canada (8:57). And the life of biological anthropologist Helen Fisher, who studied the science behind love (16:41).

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The American chip designer has become one of the world’s most valuable companies on the back of the AI revolution. But there are some contradictions in Nvidia’s plans for the future. California’s iconic Highway 1 is under threat (10:46). And why Europeans are spurning nudity (20:41).

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As Pavel Durov sits in a French cell waiting to find out if he will be charged, our correspondent probes the links between Telegram and Russia. What central bankers and monetary policy specialists have been talking about at their annual jamboree at Jackson Hole (9:16). And we answer another listener question: how might Artificial Intelligence help people with disabilities (16:19)?

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Since the invasion of Ukraine, the West has deployed massive economic restrictions on Russian trade. So why is Russia’s economy growing? A survivor’s story from the forgotten conflict in Sudan (10:47). And Turkey tries to rid its streets of stray dogs (17:56).

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Snack-food companies have long shown their adaptability to changing diets. How could the rise of appetite-suppressing drugs and fears about ultra-processed foods change the food we consume? How hearing aids and other lifestyle choices can reduce your risk of dementia (11:00). And why it’s time to revive the siesta (17:11).

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In this episode of The Weekend Intelligence, Africa correspondent Tom Gardner tells the story of 21st century Sudan. A story bookended by war. Darfur, a state which captured the world’s attention in the early 2000s has once again become an epicentre of violence, disease and famine. Over 25 million people are starving. A fifth of the population has been forced to flee their homes. This latest war is one of unprecedented proportions and yet it is an ignored war, deprived of attention by a world which once made a promise never to let such horrors happen again.

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After an electric week at the Democratic National Convention in Chicago, Kamala Harris now faces the real test in her bid to be president. Can she convince American voters? In the third part of our series on dating apps, we visit Brazil, China and Pakistan (10:24). And our obituaries editor celebrates the life of Wally Amos, the American king of cookies (19:06).

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Predicting political violence is a painstaking job. Now AI is helping analysts look for clues and throwing up fascinating insights into the shifts that may indicate a strike is coming. Why Cuba could be heading towards economic and social collapse (11:01). And our correspondent visits Odessa where Ukrainians are rediscovering the beach (18:54).

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