They're called the Blood Falls, and since their discovery in 1911 by geologist Thomas Griffith Taylor, they've fueled a century of scientific speculation. The Science Behind the Blood FallsAt the time of their discovery, Taylor attributed the color to the presence of red microalgae. The New DiscoveryWith the temperature puzzle solved, the question remained as to what physically drove the fluid to erupt. The analysis demonstrated that the Blood Falls are the result of pressure variations affecting the brine deposits beneath the glacier. With this discovery, the mysteries of the Blood Falls should finally have been solved, at least for now.