Participants wearing the VR headset saw the batbot's ultrasonic display(above).

Eduardo Kac, Darker Than Night, 1999, telepresence work, dimensions variable.

With the headset on, the viewer's sight is transformed into the point of view of the batbot's sonar. The outer semicircle represents the walls of the cave.

The crosshair at the center is the position of the batbot.

The image of the bat represents the moment in which the sonar emissions of bat and batbot cross each other, that is,

Egyptian fruit bats that happened to be flying within the batbot'srange at the moment.

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