Science

Monumental Upkeep Gives History a Helping Hand

See related story: Dec. 15, 2001: Leaning Tower of Pisa Reopens With New Angle
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Egypt's Sphinx has seen many phases of conservation, from its uncovering by Thutmosis IV in 1400 B.C. when only its head was visible, to a multiphase restoration project that began in 1989 and continues today. Weather and modern wear on the ancient statue require nearly constant upkeep.Photo: Library of Congress/Maison Bonfils

See related story: Dec. 15, 2001: Leaning Tower of Pisa Reopens With New Angle

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Photo: Library of Congress/George P. Hall & Son, N.Y.C.
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Photo: Corbis
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Photo: Dean Conger/Corbis