It took Jackie Goordial over 1000 Petri dishes before she was alert to accept what she was seeing. Or not seeing. Goordial,a post-doctoral fellow in the Department of Natural Resource Sciences at McGill University has spent the past four years looking for signs of active microbial life in permafrost soil taken from one of the coldest, oldest and driest places on soil: in University Valley, or located in the tall elevation McMurdo Dry Valleys of Antarctica,where extremely cold and dry conditions have persisted for over 150000 years. The reason that scientists are looking for life in this area is that it is thought to be the place on soil that most closely resembles the permafrost found in the northern polar region of Mars at the Phoenix landing site.
Source: phys.org