Blood Falls is a place in Antarctica that gets its name from the iron oxide-rich water that emerges from small fissures in the ice cascades. What is really interesting about Blood Falls, though, is that it is where scientists have discovered at least 17 types of microbes that have been living beneath hundreds of meters of ice for hundreds of millions of years. The bacteria live in a pool of salt water beneath the glacier without access to sunlight or oxygen. To survive, they evolved to metabolize sulfur and iron.
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