The Factonaut on Instagram: "Deep in Antarctica’s McMurdo Dry Valleys is Blood Falls, a five-story waterfall that releases dark red water onto the ice. The color contrasts sharply with the surrounding white landscape. The water comes from a subglacial reservoir trapped beneath the Taylor Glacier for nearly two million years. It is rich in dissolved iron and remained isolated from oxygen during that time. When the water reaches the surface and contacts air, the iron oxidizes and turns red, simila