Down to the wires: Africa’s digital lag

The dearth of fixed-line infrastructure that allowed the continent to leapfrog into the mobile-phone age now holds it back. We ask how to ensure the even spread of AI’s dividends. A stinking Seine has delayed the Olympic triathlon, but the river could one day help clean up Paris (7:09). And how “The Blair Witch Project” changed horror films (14:33).

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