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 muchmaligned 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: http://bit.ly/BBCEarthSubBBC Earth YouTube Channel: / bbcearth
BBC Earth Facebook / bbcearth (exUK only)
BBC Earth Twitter / bbcearth
Visit http://www.bbcearth.com for all the latest animal news and wildlife videos
This is a commercial channel from BBC Studios. Service & Feedback https://www.bbcstudios.com/contact/co...