13:15Adventures in ScienceSeries 1Episode 5: Voyager Space ProbesBBC Radio 4 Extra Duration: 15 minutes Sun 23rd Sep 2012, 13:15 on BBC Radio 4 ExtraBillions of kilometres away in space, two man-made objects still send signals back to Earth. Ben Silburn reports. From 2001.GenresFactualScience & NatureBrandAdventures in ScienceSeriesAdventures in Science: Series 1 Source: BBC Online