JIM WEST / SCIENCE PHOTO LIBRARY JIM WEST / SCIENCE PHOTO LIBRARY
National Mining Hall of Fame. Display showing a canary (Serinus canaria forma domestica) in a coal mine at the National Mining Hall of Fame and Museum, Leadville, Colorado, USA. Canaries were traditionally used as an early warning system to alert miners to the presence of poisonous gases released during the mining process. If the canary died then the miners knew to evacuate the mine.
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