Introduction
Blood Falls is a mysterious natural phenomenon in East Antarctica that still evokes a captivating mix of scientific interest and eerie strangeness. A stream of blood-red water flows out from under the Taylor Glacier and spills onto the icy surface of Lake Bonney. First observed more than a century ago, it remains one of the most fascinating subjects of polar research.
Geographical Location
Coordinates of Blood Falls: approx. 77°42′60″ S, 162°15′60″ E (decimal: −77.7167, 162.2667).
- Located on the western edge of Lake Bonney in Taylor Valley, one of the McMurdo Dry Valleys — a unique ice desert in Victoria Land.
- Taylor Glacier itself extends some 54 km from the Victoria Land plateau to the western end of the valley.
Discovery and Research History
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Discovery (1911)
The falls were first described by Australian geologist Thomas Griffith Taylor during the Terra Nova Expedition (British Antarctic Expedition, 1910–1913, led by Robert Falcon Scott). He noticed a “blood-like” stain at the base of the glacier, which was later named after him. -
Early Hypotheses
Initially, researchers thought the red colour came from red algae. Later chemical analysis proved that the effect was due to iron oxides — essentially rust, formed as iron-rich brine oxidised on contact with air. -
Subglacial Reservoir Discovery
In 2009, geomicrobiologist Jill Mikucki and her colleagues confirmed the existence of highly saline, iron-rich, anoxic (oxygen-free) water feeding Blood Falls. They also discovered microorganisms capable of metabolising sulfur and iron without light or oxygen. Hydrological Mapping and Modern Methods
In 2017, a team led by Jessica Badgeley and Erin Pettit, with scientists from the University of Alaska and Colorado College, used radio-echo sounding to trace the hidden path of subglacial water. They revealed that the brine reservoir connects directly to Blood Falls, solving a 100-year mystery about the water’s origin and movement.



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