They can reach up to to three feet in length (including the tail), and weigh up to about three pounds. They’re also relatively long-lived (for a rat) — up to eight years..... have proved ideal for detecting land mines without setting them off. This is because the giant rat has poor eyesight, and relies on its sense of smell to navigate the world. APOPO.... has been training these animals to detect buried landmines in war-torn areas of Africa since 2000. Now they are also capitalizing on the rat’s’ ability to detect tuberculosis .....in sputum samples, and thus far their accuracy is reportedly close to 100 percent.....Once a rat is trained, which can take about nine months, it can screen 100 samples in 20 minutes.....
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