Can you trust Sat Navs? James May's perspective | Earth Science

Don't trust the Sat Nav! Speaking from experience, James thinks we shouldn't blindly trust a machine. Get a map!
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James May Q&A Extras
With his own unique spin, James May asks and answers the oddball questions we've all wondered about from 'What Exactly Is One Second?' to 'Is Invisibility Possible?'
Welcome to BBC Earth Science! Here we answer all your curious questions about science in the world around you. If there’s a question you have that we haven’t yet answered let us know in the comments on any of our videos and it could be answered by one of our Earth Science experts.