Before the advent of gas detectors, miners took canaries into mines. The small birds were especially sensitive to gas, and when they fell off their perches, it was time to leave the mine – fast. Well, our canary hasn't fallen off its perch yet, but it looks really sickly. Best be careful.
Of Crocodiles And Canaries
Of Crocodiles And Canaries
Of Crocodiles And Canaries
Before the advent of gas detectors, miners took canaries into mines. The small birds were especially sensitive to gas, and when they fell off their perches, it was time to leave the mine – fast. Well, our canary hasn't fallen off its perch yet, but it looks really sickly. Best be careful.