This article is quite informative: http://www.vice.com/en_uk/read/what-makes-a-fart/ http://www.vice.com/en_uk/read/what-makes-a-fart/ "Did you know that no tw

This article is quite informative: http://www.vice.com/en_uk/read/what-makes-a-fart/ http://www.vice.com/en_uk/read/what-makes-a-fart/ "Did you know that no two farts are exactly alike? It’s true. Farts are sort of like snowflakes in that regard. Little, invisible, smelly, snowflakes." It also explains where our original methane-causing bacteria come from: babies literally eat shit during birth.