Voyagers 1 and 2 are the only humanmade objects to ever escape the solar system and reach interstellar space. But what mysteries have they uncovered? In episode five of 'Universe Explorers', experience their incredible trailblazing adventure through our cosmos...

Best of Earth Science: http://bit.ly/EarthLabOriginals
Best of BBC Earth: http://bit.ly/TheBestOfBBCEarthVideos

This is a channel from BBC Studios who help fund new BBC programmes. Service information and feedback: http://bbcworldwide.com/vodfeedback...