Have you ever heard the saying, “Canary in the coal mine.”
It originates from the 1800s when there was no way to detect odorless gas that killed coal miners
The solution was the literal canary in the coal mine.
The tiny birds would respond to the effect of gas before the miners, alerting them to danger, giving the miners the precious window of time to escape with their lives.
You, like myself, may have been laboring under the impression that the canary has to die to save the miner's lives. As it turns out, they don't.
They pass out. And they can be resuscitated.
(Hold it right there, before the image of a burly, soot-faced miner giving CPR to a tiny canary makes you want to poke out your mind's eye. That's not what I mean.)
A compassionate scientist named John Haldene invented a small resuscitator cage.
It was made of glass so you could see the canary.
The door had vents that opened and closed.
If the canary passed out, the door vent could be closed and the small tank on top opened to release oxygen into the little chamber, which would resuscitate the canary.
It's about the size of a miner's lunch pail.
The canary saved the lives of miners and John Haldene's little known-invention saved the canary.
Most people don't know about this little invention.
When you know more, you can do more.
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