Dr. Mrinalini Watsa, a researcher at San Diego Zoo Wildlife Alliance in California, scoops up soil from a fresh paw print made by Rakan, a 4-year-old male Sumatran tiger who lives at the San Diego Zoo Safari Park, and secures it in a specimen jar.
Back in her lab, Watsa analyzes the sample using a small electrophoresis device that’s connected to a smartphone. Jackpot. She’s able to detect Rakan’s DNA in the soil….(CLICK HERE VISIT CNN PAGE)