Why has the political world gone mad for essays? Professor Edith Hall and Radio 4 wordsmith Michael Rosen discuss the literary form and its history. It was heartbreak for Arsenal in the Champions League - ex-Gunners goalie Bob Wilson tells us about the pain of penalties. We look ahead to Elon Musk's SpaceX going public - are the heavens being privatised? And we celebrate the Starman, David Bowie, with a new immersive exhibition celebrating his life and legacy. Simon Jack presents.

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