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xkcd
http://xkcd.com/1405/
No, only LAVA is called 'magma' while underground. Any other object underground is called 'lava'.
SMBC
http://www.smbc-comics.com/
GoComics/CalvinandHobbes
http://www.gocomics.com/calvinandhobbes/2014/08/08
Dilbert
http://dilbert.com/2014-08-08/
GoComics/PearlsBeforeSwine
http://www.gocomics.com/pearlsbeforeswine/2014/08/08