Meet Koshik, a male Asian elephant who mimics the sounds of human speech. Here he is seen interacting with his keeper at the Everland theme park in Yongin, South Korea. He imitates the human voice by putting his trunk in his mouth and shaking it while exhaling. Koshik can say "annyong" ("hello"), "anja" ("sit down"), "aniya" ("no") and "nuo" ("lie down"), though he only produces one word from his repertoire in this video – "choah" ("good").Researchers claim in Current Biology that Koshik could provide insights into the biology and evolution of vocal learning. Angela Stoeger of the University of Vienna said: "Koshik is capable of matching both pitch and timbre patterns. He accurately imitates human formants as well as the voice pitch of his trainers. This is remarkable considering the huge size, the long vocal tract, and other anatomical differences between an elephant and a human."