 They had walked for several hours with the scientists, but the difference was that they ate the fruits of a wild plant "T. zeylanicus" as they walked.It was found from the Kaani men that it was indeed the fruits they were eating that made them energetic, a fact about the plant well known to the tribe for ages.Historically, the members of the tribes called the plant 'chathan kalanji' literally meaning 'satan destroyer'.