It was the longstanding mystery surrounding Antarctica’s Blood Falls. Now, thanks to research by the University of Alaska Fairbanks, this mystery has finally been solved. The true origin of the Blood Falls’s deep red coloring is due to oxidized iron in brine saltwater, the same process that gives iron a dark red color when it rusts. When the iron bearing saltwater comes into contact with oxygen the iron oxidizes and takes on a red coloring, in effect dying the water to a deep red color.. d Falls
