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An edition of The Forum dedicated to curves in art, in space and in life. Joining Quentin Cooper are social philosopher Charles Handy whose latest book The Second Curve suggests how some curved thinking could help point many of us in a new and better direction, artist Shirazeh Houshiary who uses curves extensively in her work and Carlo Rovelli, an expert on quantum loop gravity, author of Seven Brief Lessons in Physics, who tell us that space is curvy. Photo: The curves of a modern spiral staircase (Tim Allen)