Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Melvin Epps

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Sean O'Neill / Arup

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Sahar Coston-Hardy

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Sahar Coston-Hardy

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Melvin Epps

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Sean O'Neill / Arup

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Sean O'Neill / Arup

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Sean O'Neill / Arup

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Sahar Coston-Hardy

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Sean O'Neill / Arup

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Sahar Coston-Hardy

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Melvin Epps

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Melvin Epps

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia,© Melvin Epps

Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia

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Janet Echelman’s Moving Sculpture Creates a “Living X-Ray” of Philadelphia