"
Each rat can clear an area of 200 square meters
(2,150 square feet) in 20 minutes, something a
technician with a mine detector would take 1 to 4
days to complete. Their sense of smell is so keen that
in Africa they are also used to detect tuberculosis in
human sputum samples at a rate much faster than
the standard laboratory method.
..."
http://www.cbsnews.com/news/hero-rats-saving-cambodians-from-land-mines/
above pic by me taken at san diego zoo , the polar bear loves playing with a football
