The tiles in Entin Square, which is located at the entrance to Tel Aviv University, include covertions and comments by scientists and other intellectuals.
On the tile is the image of the disk attached to the first Pioneer 10 and 11 spacecraft that are to leave the solar system. In the diskettes, a message to intelligent races on which appear (top to bottom and right to left): two states of hydrogen atom and possible transition between states, naked figures of man and woman, position of the solar system (and Earth) relative to the center of the galaxy and 14 pulsars, schematic diagram of the solar system, and the path of Pioneer 10.
Three months later, the tiles were photographed in the same square. During the photograph, it was discovered that a number of tiles had been removed and replaced by other tiles. The current tile was removed and therefore placed on a map on the edge of the square.
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