>In answer to the last question, I think someone once made the
>point that the probes were never intended to go spelunkering;
>therefore, they did not NEED this ability, even though it would
>have been nice to have.
Actually, according to the History section of the home page, the probes are equipped with Ultra Low Frequency radios for communicating even when deep within caves, etc. This is essentially the same type of radio used by submarines so that they can be reached deep under water, regardless of where they are on the planet.
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