Tony Mann
@tony_mann
I teach mathematics. I use Twitter solely in a private capacity and any tweets express only my own personal opinions. He/him.
ID: 36400234
http://tonysmaths.blogspot.co.uk/ 29-04-2009 16:30:37
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A very clear explanation by Matt Parker and Steve Mould and Steve Mould of why your GPS doesn't say longitude is 0 on the Greenwich meridian line. youtube.com/watch?v=XB5xuA…