The TR Araña (Spanish, meaning "route tracing spider") is a robot that is claimed to remotely analyse the composition of the ground.
The device was created by Chilean inventor Manuel Salinas and was reported to be able to operate at depths of up to 50 metres.
[1] Answering a request by the Chilean Commission on Nuclear Energy, Salinas wrote the following paragraph: "[The principle behind the robot is] The non linear integration of the basic unit of life conformation the way it is known; therefore and merely as a functional and explanatory concept, I detail that our device is the integration of highly sophisticated electronic components which are able to decipher the unanimity equation in the chaos theory in the context of an integral raised to the power of the radical exponent, based in the conformation of the species, the way they are known after 20,000 years of assisted evolution.
"At a presentation to students, physicists, and engineers at the Universidad Técnica Federico Santa María in Valparaíso, Chile, on 12 October 2005, Salinas gave improbable and seemingly irrational theories to explain how his machine worked.
He offered inconsistent explanations of the device, including using concepts from science fiction, when questioned by the audience.