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We live on a planet that 70% of is covered in water but if anything falls in to deep water it becomes increasingly difficult to find. However, Sonar technology originally developed to find submarines in wartime is being used to map the seabed and find things that have been lost for years if not decades. This is the story of sonar and how it is now being used to find not only submarines but also anything from WW2 planes to missing persons cold cases.

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Written, Researched and Presented by Paul Shillito

Images and footage: Images and footage : NASA, ESA, ESO, Annelie on Tour, SB C,Chandra X-ray Observatory, caltech, Jade Timelapse

SOLVED 21 Year Old Missing Persons Case (Erin Foster & Jeremy Bechtel)
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