Blood Falls in Taylor Valley, Antarctica was discovered in 1911 by Thomas Griffith Taylor, an Australian geologist. When exploring the region (which is named after him), Taylor found red deposits coming out of the glacier. For many years, it was hypothesized that algae caused the red color. However, a research team from the University of Alaska and Colorado College discovered that the waterfall is rich with iron, and when water flows out of the glacier, the iron interacts with the oxygen near the water, which gives the water its red color. The water flows from the glacier in intervals as opposed to continuously, and is considered the coldest known glacier with a persistent flow of water.
The Ghastly Historian 
