http://blogs.discovermagazine.com/80beats/2009/04/16/antarcticas-blood-falls-shows-how-aliens-might-live-on-ice-worlds/
Also
http://www.time.com/time/health/article/0,8599,1892289,00.html
http://tierneylab.blogs.nytimes.com/2009/04/19/the-dark-secret-at-blood-falls/?hp