A strip of land that runs between North and South Korea, setting a boundary between the countries, has unexpectedly become a wildlife haven. The land, known as the demilitarized zone (DMZ), was blocked off as a buffer zone between the two countries when the Korean War ended in 1953. Since then, human activity in the 150-mile-long area has been restricted, which has helped nature thrive. Scientists, who were allowed into the DMZ for research, found 6,168 species of wildlife living there. This includes golden eagles, mountain goats, wildcats, lizards, and otters, as well as flowers and herbs. Using remote cameras, they were also able to spot an Asiatic black bear cub, providing hope for this threatened species.…