The margins of Malden consist of continuous land, whereas the interior of the island has salty inland lakes. Malden is approximately 29 km2 with a large lagoon. It has evidence of previous habitation by Polynesians before European discovery. Guano deposits were worked and depleted by 1920. The British used it to test nuclear weapons in the late 1950’s. It became a wildlife sanctuary and reserve in 1975 and was incorporated into the nation of Kiribati four years later. It is currently uninhabited (Encyclopedia Britannica). Photo credit: Image Science and Analysis Laboratory, NASA-Johnson Space Center (Digital File Number: ISS006-E-38455)