Beneath the surface of a remote island lake, something unusual involving jellyfish has been unfolding for thousands of years. Isolated from the ocean, this ecosystem hides a phenomenon that continues to surprise scientists. In the Rock Islands of Palau, a remote marine lake is home to one of the most unusual wildlife populations on Earth. Jellyfish Lake, located on the uninhabited island of Eil Malk, contains millions of jellyfish that have evolved in isolation for arou... [3202 chars]