File:Bloodfalls.jpg

By National Science Foundation/Peter Rejcek - http://photolibrary.usap.gov/Portscripts/PortWeb.dll?query&field1=Filename&op1=matches&value=BLOOD_FALLS.JPG&catalog=Antarctica&template=USAPgovMidThumbs, Public Domain, https://commons.wikimedia.org/w/index.php?curid=38735981