It is a mystery. Japan is made up of many islands, including 158 uninhabited islands, and recently experts fear that one of them is missing. The tiny island, known as Esambe Hanakita Kojima, was officially surveyed and registered by the Japanese Coastguard in 1987. The island rose 1.4 meters (almost 5 feet) above sea level and was visible from the northern tip of Hokkaido. It is unknown whether the island was washed away or if earthquakes may have caused it to sink or if rising water levels due to global warming covered it or if some other thing caused it to disappear. What do you think happened to it?