Comment Re: No mystery at all (Score 1) 111
No. Wrong. Canaries were indeed used for methane detection, look it up. You are imagining the canary would have to pass out or die. False. Reality is the canary is normally a very songful bird, but will *stop singing* if concentration of certain gases (including methane) raises about a certain level, WELL BELOW any level that would make the bird show signs of harm.