of Münster") created for the 1987 edition Skulpture Projects; on its trunk was the imprint of a hand which gushed water. Others were the Faggio di Otterloo ("Beech of Otterloo") conceived for the outdoor sculptures park, the Rijksmuseum Kroller-Müller in 1988, the Albero delle vocali ("Vowel Tree"), a sculpture thirty meters long placed horizontally in the Tuileries in Paris, where it has been installed since 2000, or Elevazione ("Elevation") 01 2000-2001, a large tree raised off the ground in Rotterdam. Many of Penone's works produced in the second hall of the 1980s are closely bound up with the idea of contact as a generator of memory and change. The series of works titled Verde del bosco ("Green of the Woods"), created between 1983 and 1987, are frottages on canvas of the trunks of forest trees, made using the leaves of the trees themselves. Sometimes the canvases are united in a single work with the trunks that produced them, or with Gesti vegetali ("Vegetation Gestures"), as in his installations in 1986 at the Museum of Grenoble in France and the Palais des Beaux-Arts in Charleroi. Like hair, nails are an extension of the body, the part used to investigate or attack matter, but they also the part where the materials from contact tends to sediment. Starting in 1987, Penone created large glass sculpture in the lorm of nails and places them in contact with different materials, piles of leaves, forest trees, logs and blocks of marble. They were the theme of the 1998 exhibition at the Musée Rodin in Paris. In the cycle of works titled Terre ("Lands") created starting from 1988, the earth sedimented in layers, as in its natural state, is enclosed in a transparent glass parallelepiped through which can be seen the imprint left by a gesture of the artist, the upheaval in the soil which preserves the image of the hand that caused it. 1990s onwards In the personal exhibition presented at the Église Courmelois at Val-De-Vesle in 1991, Penone displayed the large sculpture titled Suture ("Sutures"), which he worked on between 1987 and 1991. In it the enlarged negative of the image of a human brain is rendered by four jagged lines of steel that reproduce the points of contact between the four lobes, marking their boundaries and lines of contact with each other. A Y-shaped transparent glass tube containing soil constitutes the central element of