We’ve become so reliant on maps apps on our phone that use GPS, it’s hard to imagine navigating our way around without them. 

R.I.P street directory books. 

But what happened if GPS systems around the globe randomly went down? 

Dr Sophie Calabretto talks to Cosmos Magazine journalist Jacinta Bowler about how GPS technology works and what would happen if it suddenly went dark.  

Plus what other types of GPS are spinning around above our heads.

The podcast The Science Briefing is a LiSTNR production

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