Giant Rats Can Detect Tuberculosis! - Extraordinary Animals - Series 2 - Earth

Feared and regarded as dirty, dangerous and diseased, if there is one creature that tops the list of people’s most hated animal, it is the much-maligned rat. Yet in Tanzania, scientists have trained rats to detect patients with tuberculosis, but what makes a rat’s sense of smell so good? Subscribe to BBC Earth: BBC Earth YouTube Channel: BBC Earth Facebook (ex-UK only) BBC Earth Tw