[PIF]

The important take away is that they have found ne evidence of life. At least that we know of.

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They are not equipped to find evidence of life in the emptiness of the void, assuming some sort of free floating life form exists between planets or between solar systems. They could have passed a cow on skates and not have known it; they simply have no instruments to “see” such things.

[Robert DeLong]

Voyagers 1 and 2 are identical spacecraft. Each is equipped with instruments to conduct 10 different experiments. The instruments include television cameras, infrared and ultraviolet sensors, magnetometers, plasma detectors, and cosmic-ray and charged-particle sensors. In addition, the spacecraft radio is used to conduct experiments.

Fact Sheet: The Voyager Planetary Mission

I have never seen anywhere where it states what the exact experiments they were capable of conducting. But I can't imagine they made no attempts to contact intelligent lifeforms in any of their experiments. Particularly the experiments involving radio transmissions. If you have further information I am open to review it.