A waterfall that looks like blood flowing from the ice.

Deep in Antarctica’s frozen Dry Valleys, bright red water pours out of a glacier in a place called Blood Falls. For more than 100 years explorers wondered what caused the eerie color. The answer turned out to be rusty iron-rich water flowing from a hidden salty lake beneath the glacier.

Even more surprising? Tiny microbes live in that dark, freezing water—showing scientists how life can survive in some of the harshest places on Earth.

One of the strangest waterfalls on the planet… hidden in Antarctica.

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