Andrew takes a break from maths this week and immerses himself in all things musical, from a classically trained Japanese guitarist on the outskirts of Berlin to the expressive notes of some avant-garde ping-pong balls closer to home.

Meanwhile, a slightly hungover Ed ponders aloud some of the big mysteries of our time; Why does online shopping so often result in the unintentional purchase of "clown pants"? and, If one's underpants can mistakenly be considered to be invisible, are potential "Peeping Toms" happy or sad?

Join us for another wondrous wander.

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